I’d make that call before you even soak a seed, so you’re prepared. Also, depending how you want to “shape” the plant, you need to start doing that pretty early on in their lives. Autos somewhat limit the amount of training you can do, and when, without affecting your yield. Just some more things to think about while you’re already pretty overwhelmed. You’re welcome! 
There’s a good thread on the topic here: Scrogging Autos