As a Rebel Your Enemy is the Empire, And You will do whatever it takes to Stop them.
But You wont do it alone. You can have a Droid to help you out. Type:
/droid (you can then choose and name a droid that will follow you )
You will be able to carry a blaster, Type:
/shot get Blaster
To become a RebelCommando You will need to obtain 15 experience (XP) points by Doing Rebel Quests from Coruscant.
As a RebelCommando You will be able to use a Sniper Rifle. Type:
/shot get sniper
To become a RebelGeneral you will need to do 2 very important things.
1, Go to Yavin4 and Talk to Cassian for a quest
2, Go to Scarif and find the Deathstar Plans
As a RebelGeneral You will not only be in charge of the lower ranks, but you will be able to use Airstrikes.
/shot get Airstrike
Throw the airstrike item, and get out of there asap