Step one: Go talk to the nearest Ag operator. Talk to more than one if you can.
I went to the Ag operator who works the farms around my house. We talked for a while. He said to do something else, it's a tough business with very early start times and very long days.
He also said, "Ag aviation is going to be unmanned and automated in about ten years". I don't know if that's true or not, but he's convinced it is.
He also said the best way to get into it is to find an Ag operator who is retiring and selling his business. Buy his entire operation and make training part of the deal.