Scared of car I built

Can someone explain to me how my car is going to feel via similar setup...or has anyone else been in the situation as the title?

4 year build and it's done. I'm terrified of driving it for some reason. Just keep thinking it's super dangerous

I had a coyote mustang 5 years ago with about 700rwhp, was amazing and had a lot of confidence but idk what's going on.

3800# car, turbo 6.0 LS. Th400 trans, full manual, 85mm turbo on e85. Air to water setup.. Should be around 800 to the wheels right now with the potential to go up to about 1200rwhp.

All the suspension is done. its on a drag pack with fantastic tires. 6 piston brakes up front... It's setup correctly but idk why I'm so scared of it.. maybe it's not knowing the power delivery or thinking about wrecking it lol...hell getting pulled over. I used to love this shit but now it's just giving me a ton of anxiety

Anyone?