Formal version: "watashi wa James desu" ?
I think "Boku" is the informal way to say it.
Google is you friend,for basic translations and small sentences use that.I did a 4 week crash coarse before i went to Japan.It helped alot,though i wish i learnt more.
First one i found,but there are plenty more that go more indepth.
http://www.japaneselifestyle.com.au/japane...hrase_basic.htm