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.
High end commercial, multi-family and residential lawn care, irrigation (LI and BPAT), and landscaping.
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