Steroids cause minimal fat loss. Like the other guys have said, diet is the way to go. A solid diet & cardio program will help get rid of the fat 20X more quickly than any AAS.
Of course, you can always add in some fat loss drugs if you like...they would certainly help speed up the process. You could use Clen, T3, Ephedrine, etc (not all at once). Personally, I would recommend getting your T3 levels checked before using T3. T3 can help burn a lot of fat, but it does this solely by increasing metabolic rate---increased calorie burning. This means it is indiscriminate regarding the type of calories it burns. It is just as likely to use calories from exitsing muscle tissue (which means muscle loss), as it is from fat cells. This is especially true in women, as they lack the hormonal profile of male steroid users, which helps spare muscle tissue. Even then, many steroiud using men have lost muscle tissue when using T3.
Therefore, for someone in your situation, unless you have a sluggish metabolism (low T3 levels), then it is not the drug for you. A better alternative...in terms of losing fat while maintaning muscle tissue, is something like Clen or Ephedrine. In addition to those (use ONLY one at a time), you could add further fat loss agents (but no other stimulant-based drugs), such as Yohimbine HCL, green coffe bean extract, caffiene, etc. I realize caffiene is a stimulant, but when used at normal dosages, it doesn't seem to cause a problem and will further enhance fat burning. You could combine as many non-stimulant fat-loss compounds as you like, assuming they all work through different mechanisms, as it doesn't make any sense to use 2 compounds which basically do the same thing.
Growth hormone is another excellent, although expensive drug, which can be combined with any of the above. It directly causes an increase in lipolysis (releases fat from fat cells), while assisting with muscle growth, although to a much lesser degree than steroids. You don't have to worry about getting "too big" when using GH. It will also helo improve your hair, your skin, your sleep, make you look younger overall, and provide numerous other benefits. Since females produce a relatively small amount of GH, even small amounts can make a significant difference, although the drug should be used a minimum of 3 months. In terms of fat loss, results come rather slowly, but they are consistent and will continue to pile up over the long-haul.
If you eventually decide to use a steroid, there are several exceptable choices, but be forewarned, many of the steroids desired by females are frequently bunk. Steroids such as Anavar and Primo are two of the most commonly mis-labeled steroids sold today. In fact, I would guesstimate that as much as 90% of all Var and Primo being sold by UGL's is not real Var. This means that you might think you are using Anavar when in reality you are using a completely different steroid...and it is almost assured to be one with a much more potent androgenic profile...which means it can cause masculinizing side effects. You need to be very careful when buy these kind of steroids from UGL's. Actually, my ecommendation, if you are not actively involved and up to date in the UGL world, is to avoid using these products altogether.
Rather, there are a few legal alternatives, which are not only as weakly androgenic as car or Primo, but are virtually gauranteed to be 100% legitimate...assuming you buy from the right companies. Two great choices for women are Halo Extreme (Halodrol) and Osta RX (Ostarine). Halo Extreme (not to be confused with Halotestin) is a vry weak androgen and provides effects very, very similar to Anavar. You will not gain any bulk or bloated muscle. It will all be lean, hard, an dry...and if you are following a reduced calorie diet, which you should be when trying to lose fat, you might not gain any muscle at all. Rather, it will simply help you harden up, dry out, and become more "defined" overall.
Ostarine is a "steroid-like" drug tecnically known as a S.A.R.M. (selective androgen receptor modulator). This drug was invented bya pharmceutical company specifially to provide anabolic effects without the typical steroid side effects. You will not experience any androgenic, estrogenic, or progestagenic side effects. In other words, there are no visually noticable side effects to speak of. It works almost soley on muscle tissue alone. My wife just finished 8 week cycle at 15 mg/day. She experienced ZERO side effects. I recommend buying through IML (Halo Extreme or Osta RX), as I know they 3rd party lab test every batch of every product they sell. They are a reputable, respected company.
I would be a great idea to hire a well known, respected coach for help with constructing a diet...one which will help you achieve your goals, while also being compatable with yourself lifestyle and personal preferences--as much as possible, of course.
Some guys might think it is too early for you to hop on fat loss drugs. I believe it is too eary to begin using AAS of any sort, but as long as you are under the proper supervision...someone who can teach you how to responsibly use fat loss drugs/supps...I don't have a problem with it. As long as you are doing what you should be doing in your diet & training, then why does it matter of you use fat loss drugs now...or wait until later? From a health standpoint, it doesn't make a bit of difference. I think some guys are just worried the person might slack on their training & diet and expect the drugs to do all the work...and I agree that is not the way to go, but if you are working hard, then there is no reason you have to "wait" to benefit from these fat loss drugs.
With a proper diet, a sound weight training & cardio program, the right fat loss products, and perhaps a steroid/SARM a little later on down the road, you would be able to make very rapid progress.