I would sign up for Dev 22 but I'd need to read through it all again and I just don't have time.
DO IT.
Because given how you'd be quite new to it--play it as your character does, Draignean is a kind GM in that he gives complimentary backstories as to what you did in reference to who you are.
The OP lore is always useful. 
I've been contemplating entering it with a character that doesn't really know what's going on, for the meta-reason that I've tried to read it but have only gotten through the first 50 pages or so.
That's how I play every RTD I'm in.