Im 18, and this is my second year with 20 clients.
Dont be like I was and be scared to charge what the pros with the big rigs charge. As long as you KNOW you can do a darn good job, it doesnt matter how old you are or what you drive - you're worth as much as anyone else. I learned that a little later than I wish I had, but oh well. I was doing lawns for $25. Then this year I upped it to the going rate of $30-40. Dont cut yourself short. Act confident, professional, and always justify the price, and people will pay it.... (usually haha)