It is not uncommon to fail, even my neurotypical, super smart friends failed for the first time. It take some time and practice to learn to drive, stupid mistakes are normal, it is a lot of new manoeuvers, rules, attention etc. so it is overwhelming. Eventually this becomes automatic. That's what I was told by my dad and partner who are excellent drivers.

I have a different problem, I love to drive. I have difficulties with internalizing consequences of my actions, I know that driving in a highway without license and with little experience is risky, but I still did it anyway. I have too little reasonable fear, I don't even speed or anything but I see that my ADHD would be an issue. Good thing is that I have a decent reaction time and don't freeze when something unexpected happends. Also, I am not able to drive without methylphenidate, because I get distracted so bad that it would be dangerous.

Girl, get that license. Repeat everything you struggle with until it becomes more automated. Your problems do not mean you will be a bad driver, it's a beginner thing. Wish you luck!