You can get hired OTS from Envoy (or any other WO carrier for that matter) as well. You better have some things to make yourself stand out though.
Honestly, if you are dead set on going to AA, I would recommend going to a WO in case OTS doesn't work out. And, for whatever reason if you change your mind about AA, you can still try to go somewhere else too.
What is your background, if you don't mind me asking?