Best advice would be to find one of those gyms that have medical rooms and get one of the guys there to do it for you or go to one of those heroin centers for addicts and ask one of the nurses there to help you out or at least show you how to do it...
otherwise...just to it yourself... its no big deal...make sure its a handspan from the hip or the knee and on the outer side of the quad...make sure its muscle your going into...it wont hurt...but keep your leg in a relaxed position...not bent of tensed...
put it in slow at a slight angle so when you aspirate youll be able to see the bubbles come up without any trouble...and if you dont see any blood go for it ...but make sure you research exactly the doses and that you have all the stuff you need for the entire cycle before starting anything...
otherwise...just to it yourself... its no big deal...make sure its a handspan from the hip or the knee and on the outer side of the quad...make sure its muscle your going into...it wont hurt...but keep your leg in a relaxed position...not bent of tensed...
put it in slow at a slight angle so when you aspirate youll be able to see the bubbles come up without any trouble...and if you dont see any blood go for it ...but make sure you research exactly the doses and that you have all the stuff you need for the entire cycle before starting anything...