My advice is to remind you that just because you are driving a faster kart, doesn’t make you a faster driver. I use to have the same thoughts. Coming from motoX background, BMX, cars, etc….. I always grew up with a dad that use to walk around saying “you can never have enough horsepower”.
My advice is to rent a kt100 or KPV for a regional event and see how you do, but be prepared to be humbled. The power of cars and moto can get you out of mistakes. The 100cc karts are PURE driving. I have learned a ton going down from TAG to f100, including that I still have a lot of work to do.