I have about 8 hours and I still wander in straighish and levelish.
How many driving lessons did you have? I bet you didn't think about how bad you were 10% of the way through those, you just thought book another lesson and get the test done.
Don't worry about it too much, just enjoy it for what it is, and don't compare yourself to others, some start slow and figure it out in the end, others start fast and never make it.
The likes of me and you start slow and stay slow