I've dislocated my shoulder more times than I can count. I wish I had let it heal properly before trying to train again. You'll want to keep the arm totally imobilized for two weeks. After that, start doing isomeric excercises to strenghthen again. Some excercises include:Get you hands on some tubing or some material like they use for turniquettes. Like a big rubber band with some resistance. Tie the band to a door handle or something and strenghthen the different shoulder muscles by pulling across your body, perform side lat raises, front raises etc. DO NOT go higher than 90 degrees. Once it feels normal again. Say another couple of weeks, go to weights, but again, do not raise your arm above 90. Once strength has returned, try excercising as normal. Don't rush it.
I know this is long, sorry. Hope this helped.