First: take a look at this video so you know how to inject
How To Inject Testosterone - YouTube
Second: use arimidex only during cycle and then use nolvadex because arimidex will have a rebound effect once you stop it (your estrogen will go way up) but with nolvadex there is no rebound.
Three: I suggest you use a 23g to inject because with a 24,5g it will take forever to inject,in my opinion it's too thin.Also use a 21g to pull the testosterone from the vial.
Four: It would be great if you could shoot HCG from week 3 and on so you keep your testicles alive and have an easier pct, 250iu every 4 days.
Good Luck