Dude, you should hold off on using steroids til you are at least 26.
I did'nt do my first cycle until this year(I'm 31), but I researched stacks and steroid types for about 3 months before i did an actual cycle.
I did a 3 way stack
Deca,dianabol, and test cyp.
And I was exteremely pleased with the results, Bodyweight went up to 240
lbs @ 15% bodyfat from 210 lbs @ 20% bodyfat.
And I almost forgot if you cycle anything always always always follow up with a Post Cycle Therapy, to wake the twins back up.
Use milk thistle if you're taking an oral steroid(for liver support)
I retained most of my gains from that cycle, although I took 2 months off from serious training due to work and then getting my ass kicked by a viral/bacterial infection.
But I'm online to start back on monday with another mass cycle.
Same stck except I'm going to use turanabol instaid of dianabol.(easier on your system)
My final advice to you is to....
1. hold off for a few more years.
2. do a ton of research
3. tap a few shoulders of the "beasts" at your local gym.
4. If and when you decide to use gear
do not think more is better
Good luck with your goals.