It varies from person to person. Both in giving tells
and reading them.
If you have never played live before, it will be a challenge, but you can do it.
It usually takes several orbits to get the 'feel' of the table, but you should have a good Idea of who is loose and who doesn't play much after 20 hands.
Because they play a lot of hands doesn't mean they are bad and because they play few hands doesn't mean their good either.
I find live a lot looser than online and more passive, but they will call you to the river more.
Don't bluff a lot, don't Hollywood, and look at your cards when other people are not looking at you not when its your turn and everyone is staring at you (a lot of people here don't agree with this last point).