Hi Parker!!! Glad you've chose the dirty path to the coolest detachment of the 501st!!!
Sure thing you can become a member. So you've done your diligence. To me here's a quick due list:
1. Hit Imperial issued armor will find my link tomorrow on my comp for trusted vendors if not a fellow brother will post it.
2. Once you decide which TD you want to emulate or if you decide to do your personal flavor, then you are legible for your local Garrison revision.
3. Done that apply to the 501st. After you become accepted your status here will change to Sandtrooper.
4. Then request deployment and last but not lest invite me for a pint at the Cantina 😄😄😄
Hope I've pointed you in the right direction. Ask tons of questions. Might want to check ATA, TK, or RS armor depending on your budget 😉