I'd encourage you to take the class/test and get your license. I started working on my license right before I turned 18, took the test a few months after my 18th birthday. If you study hard and work at it you can pass it. It wasn't easy but I think you can handle it. It has been great having the license. I enjoy irrigation/landscaping and that is where I am trying to shift my business's focus to.
The only down side is that it isn't cheap to get your license, I think it ran me 700-800 to get mine plus commuting costs (gas, meals, etc) to the nearest class and to the test in College Station.
If you have the opportunity work with a guy like TXirrigation or another good company in your area I'd highly recommend going with that. Having the field experience under your belt is a major plus.
Scag, Exmark, Honda, Shindaiwa, Redmax. Commercial and residential Lawncare, Irrigation (LI and BPAT), and Landscaping. Fully insured.
Mikegyver Pics Thread
People pay you to hold their hand. If you don't like doing it, then you are in the wrong business.