You're gonna need alot more than 2 or 300hrs to be insurable. I have a few buddies that AG fly and they have more than 10,000hrs of flight time. I asked about it and was told I would need a spray license and also tail wheel/aerobatic indorsement. Finally, I was told I needed about aother 1000hrs of flight time (currently at 3000hrs).
This is in California and one company only. Try flying banners somewhere like VanWagner! They'll train you and pay for your tailwheel training. Good luck.