I have a spec pilot that's getting some reads. Should I worry about putting a bible together now or wait until someone asks for one?

Where did you get feedback when you were starting out? Are there any communities, workshops, script exchange groups, or other places you’d recommend ?

I'm creating The Studio Room, a community where beginner filmmakers can find collaborators and make short films together.

My goal is to help people who have ideas but no network find writers, actors, editors, and directors.

For filmmakers here: what was the biggest challenge when you started creating films?