too late to win a world champioship, maybe, but never too late to do something you want to do.

you can spar when you feel comfortable. some guys go in right away and some guys wait a month or two. I waited about a month, just because I was always hard to pair up. So I went in with my trainer, an old man, and we just had some fun for 5 rounds, I landed a couple, he landed a couple, but it was just going easy for a workout. But it's up to you when the right time to try it is and to go in with a guy who'll take it easy on you to help you develop, not hurt you to show how good he is. typically your partner will be better so you'll learn something. As YOU get better YOU'LL be the guy in charge with the newbs.

don't know the other answers.