Ok the only time I saw somebody raise 10BB's is when I was in a tournament and the blinds were like 10,000/20,000 and the dude went all in for like 300,000.
Live play is a different world. Hands are delt slower and played differently. I wouldn't recommend going into a Casino for your first live game. Get some buddies togeather and play a small tournament style $5 buy-in, with $2.00 rebuys. Get a feel for reading them, doing some small table talk and how live feels. Then when you have done that a few times, go into a casino and sit down at a 1/3 LIMIT game.
I say limit because this will help you out more than you'll ever relize. Your probably thinking......Well I can't make a bunch of money off of limit. Don't worry chances are your first time you won't make any money!! The first time I ever went to a casino I sat down with the minimum at a $1/$3 limit table, which was $30. I lost it all, went and got more chips, lost it all. I actually planned on that happening because I wanted to get the feel for it and the people I was playing. So I went back to the table and sat down with double what I did previously and within an hour I broke even and got all of the money back that I lost.
You don't want to go into a Casino your first time and lay a bunch of money down, and you don't want to sit at a table with the bare minimum. If you have a table that is min. $30, sit with at least $100. Most people will sit with $100 or more. This will allow you to play more hands.
You will get nervous, I don't know if its nerves or your blood is just pumping really hard!! My first time at a table I didn't know what to think, I was just excited that I was there. Within 5 minutes we were all talking and having fun.
Also as stated above, you really don't have to have 100% understanding of the math involved in poker. Just look out for things, such as possible straights and flushes. Remember who showed bluffs and who plays anything, who's a bully better, and who might have the nuts.