Im curious what the other cars in your class were, dare to share the time sheet? If there were only four cars in your group you don't have to share, and we will not discuss it further.
I have a time attack event coming up on sunday and they basically decided to put all +2.4T/+3.5NA cars in one final group. So if anything McLaren or Ferrari shows up, yeah it is in my group.
Anyhow, I find that lots of gokarting and gps/data analysis is really helpful to keep oneself in shape and get the most out of the seat time available. I have personally learned the most by comparing my gps data with someone who is slightly faster/more skilled at a given track but in a car with less hp such as an E92 M3. Then as you get the basics dialed in better using that data, the power will push you in front. I often find myself late apexing too much (thinking I have more power than I actually have), braking too early (no balls) and forgetting to look long in high speed corners (also lack of balls). A wheel coming off at any speed also doesn't help with confidence, maybe consider avoiding that?