Well done Jason, don't cock it up!!!
Check out smartcockpit.com. The site is run by a Ryanair training captain so he knows his stuff about the 737NG.
The CBT in CAE is crap but the manuals supplied are thorough. Generally a question bank floating around so get one when you go to STO or AMS. Of the 2, apparently STO is the better facility. AMS is easier to get to from London area as obviously a lot closer.
Don't waste time getting accomodation sorted. If you drive to EMA and book in advance you can get really good deals at travelodge at EMA. I stayed for £15 per night last year booked on the net. Accomodation at CAE, if that is where you go is hard to get.
Check your PM, I'll give you a good address for CAE.
Otherwise make sure your IF skills are ok within reason, but don't get too excited about it. 2 crew operation on a jet is a whole new ballgame.