Another way is to find an IMAC and/or pattern Event in your area. Go to it and fly in it....dont worry about winning, just learning at first. I suggest starting in basic -even if you are a really good sport pilot. You can always move up.

While at the event, get an experienced person to call for you and coach you. Also, spend a lot of time scribing for judges and getting feedback (after the flights) and why they scored what they did.

I also recomend the books from Don's Hobby - both are excellent!

Keith