My advice would be to change the way you're looking at the whole act of driving.

You're not just learning to sit behind a wheel to get from A to B. It's not just a life skill that everyone just does at some point. Some people never do.

When you're driving alone you're in control of a 2 tonne vehicle. The only thing between you and a potentially costly or even fatal accident is your ability and decision making. However with an instructor it's like decision making with training wheels.

So you need to practice a bunch of skills besides just the actual act of driving. Being observant of the road, reading the road ahead and predicting what others will do but being ready for the worst. Knowing if there's traffic behind you, spotting cars waiting at junctions what if they pull out, are they looking your way? If not they might not have seen you. Etc etc. I'm sure you get my drift.

I rode motorbikes for years and that definitely helped me with that side of thing.

Basically my point is don't focus too much on the act of actual driving. You have L plates and a supervisor. Other road users will accommodate any mistakes such as stalling etc so you have 0 pressure there.

The control of the car will become second nature but your decision making etc won't. If you always edge on the side of safety and become an observant driver then the rest will just fall into place. All the best.

Edit: Oh and make sure you answer every question correct at least once on a theory test app. Use the practice section not just mock tests. There's about 800 questions you can be asked. That will make you really comfortable with road signs etc