The best practice you can get is to shoot a local match. Most cost around $30 for an entry fee.
If you want to practice some of the simple skills cheaply, then don't worry about live ammo as much. Practice reloads in your living room or your backyard. The hardest reload to become proficient with is the shotgun. Get some snap caps so that you can practice those.
You don't have to be a professional to shoot a local match. Go and watch one first if you'd like. You will meet some great people, and they will be more than willing to help you. It might be a "competition", but most everyone I have shot with have offered advice to the new guys to get them going on the right track.