Joe
The post above are dead on and sounds like guys with lots of experience! As mentioned above your going to really have to want it to be a fighter pilot. It's not a dig on you about not being sure just warning you UPT is a whole different animal compared to civi flying. Humility, determination, and your fellow classmates are the only thing that will get you through.
I was a civilian regional pilot before joining a guard fighter unit. I made it through but watched bro's with no flight experience do 10x better than I did and dudes with more experience wash out. The best way to make your decision is to be well informed and to do as much research as possible. That being said, you will not regret perusing something you've always wanted to do especially serving your country!
Feel free to fire away with questions on this forum. Don't be afraid of the fear, sarcasm, and ridicule. It comes with the territory.