I'm somewhat new to ADR's, so go easy on me please.

I'm planning a trip for the end of November (229 days away), and want to make ADR's for some of our must-try restaurants. I won't be able to make these ADR's until we're 180 days out, correct? Will we need to have our resort booked by then too, or can we make ADR's without? Is there a limit to how many ADR's I can make? We will NOT be getting the dining plan, if this helps.

Thank you.