It's no biggy, but having some experience with patients, here are some tips.
1) Draw the solution into the syringe.
2) Go a little past what you need. If you need 1 CC then draw up 1.2 or 1.5 CC
3) Holding the syringe and bottle in one hand, flick the syringe where the hub is
(the part where the needle meets the syringe)
4) That will cause a bubble. Now push the plunger in back to the dose you want.
5) the bubble (air) will go into the bottle and out of the syringe.
The biggest mistake people make when I used to teach them how to give shots (medical assisting school) is that they tap the syringe and expect the bubble to disappear. Once you tap it, you'll get a bubble.
Best to draw a little extra, tap, then squirt it back into the bottle (or in the air if your rich) to the dosage you want. IF you tap again, you get bubbles again.
I hope that explains it.
Mike