A complete list of the Q-codes is available in the Basic Study Guide for Basic Qualification. If you don't have access to the list, just ask any ham to explain any term you're not familiar with. I am finished sending or please stop sending. It is also recommended that new hams brush up on the phonetic alphabet. When working a weak station and trying to pass information it goes a lot easier if you are both using the standard phonetic alphabet.
Many hams still use a mish-mash of made up phonetics and it only causes more confusion.
That's not to say that you can't have some fun with callsigns and phonetics when conditions aren't a factor. Many new hams have graduated from the ranks of CB radio and are still intimidated by the new lexicon of ham terms. Hams do not use the 10-code, popular in CB, but no one is served by making someone feel foolish on the air. The best advice is to listen to other hams on the repeater and don't be afaid to ask questions. Most hams remember all to well what it was like to press that PTT switch for the first time.