Let's not stand on ceremony and cut to the chase, with a few things, maybe more than a few in your case...
First of all, the whole 'I'm going to start at 300mg and work my way up instead of rushing into a high dose like the rest of the fools' mentality is respectable and all, however, there is a fine line between underdosed, well-dosed and well, you get the picture.
Testosterone Cypionate @ 300mg/week is a high-end TRT dose. Yes, you will most likely experience physical changes, however, the fine-line I speak of, as would many others in regards to your dosing regime/goals, agree that you are underdosed. What determines whether you're at an optimal dose is quite simple, your goals, which in this case I can and will safely assume is to be in an anabolic state for the hopes of body transformation purposes.
'More is better' is true and does apply when comparing 300mg with 500mg of Test C and the whole 'oh i dont know how my body will react to it' crap is automatically dissolved. It's Testosterone, how do you think you're going to react to it?
It's going play a big positive part in you reaching your current goal(s), OH you meant how is your body going to react negatively to it?
Well, estrogen is your only issue and what ever other genetic predispositions you carry will most likely be further pronounced (MPB, anger, oily skin, severe acne, gynocomastia, blah blah blah...), these are not uncommon and without experiencing these I recommend you accepting that you may well in fact experience three-quarters of these side effects. The use of an AI will help abate the gyno and other nasty estrogen related sides which then has us asking... what other side effects could you be concerned with? You ask as though you run the risk of losing an arm or a finger with a higher than 300mg dose. There is no other unknown side effect you will encounter, so BANG, your point "A low dose will let me know how exactly I'm going to react" has been dissolved.
I'm sure anybody worth mentioning will agree a LARGE dose of Testosterone should not be used for a first cycle, the same exact same people will also agree that using a LOW dose is of same stupidity.Testosterone Replacement Therapy dose, the negative side effects barely differ between 300mg and 500mg/week (increased oily skin maybe, increased water retention most likely, however, irrelevant) If they worry you, do not ever inject a steroid into your body, simple. However, the positive side effects in terms of gains between 300mg and 500mg differ greatly. If you want to know a smart dose to work from, 500mg of Testosterone alone should be used for a first time cycle.
Don't give us that crap about not knowing how you will react to Testosterone because you will have no idea anyway seeing as though it will be coupled with Dianabol, you won't even know which compound is doing what, which negative side effect is from which AAS, you will be taking guesses. Any dose or any cycle which has you guessing, is a bad cycle. Your now so called 'smart dose of 300mg' is now a very silly cycle. Do you see my point? You're ignoring many other important angles.
Anyway, let's begin.
You should of had your PCT on hand before beginning a cycle, but you fucked up so we'll move on.
PCT begins 18 days after last pin.
Clomid 100/50/50/50
Nolva 40/20/20/20
AI Dosage?
Begin with 0.5mg M/W/F Don't know what dosage is best for you? Either do we. Get blood work done as often as possible and track E2 levels, you probably won't figure out your sweet spot dose during your first cycle. Adjust accordingly on your cycle after, and again with the one after etc etc... that is how you learn what works best for you, not by some guy telling you what he does, you're not him.
Start researching more and you'll soon learn 300mg of Test C pinned once a week is not 300mg of Test C/week. Many people think 'if I inject 300mg and it has a half-life of 18 days, that means I will have 300mg of Test for 18 days' that is your current theory, as is of many others, don't be part of the many others, be part of the 5% who know what the F is going on.
A quick side note, a healthy male produces anywhere between, well I don't know... 60mg-80mg of Testosterone per week? Let's say 80mg or arguments sake. You've now injected 300mg of exogenous Testosterone and have suppressed your HPTA, meaning you're now producing ZERO endogenous Testosterone, subtract the already 80mg you would of naturally had from the 300mg and you're left with 220mg of Testosterone, pfft... assuming it's even dosed at EXACTLY what it's said to be dosed at, I'd say less, but we'll pretend it's dosed perfectly, you've now suppressed your HPTA for 220mg extra Testosterone. hashtagNotWorth.
If I've missed anything please let me know, I've literally forgot what I came here for now.