Evan,
here's a tip.
Write all your questions down then post them all in one post, not multiple posts in multiple threads.
Basically you walk in, pick a girl, go into the room, pay her and relax. They're not going to rip you off.
You can take a shower with the girl before and after, have a steam and/or sauna in some places (ZB and NF) and relax. These girls are pros. They know what goes where and why.
Yes, a little Spanish would help. The girls make very little money so be sure and tip for good service. 2000-5000 is a good tip.
Relax, there is no rush, they aren't going anywhere. If you don't see anyone you like you can wait to see who comes out of a session or move on to the next place.
I suggest you become a CRT VIP. That will give you access to a map that will show you were all the MPs and clubs are in the greater San Jose downtown area.