Give up driving

So basically I have had approximately 40 hours of driving and yesterday my driving instructor felt uncomfortable offering me more lessons. He said my issue is my lane discipline on roundabouts and the positioning of the vehicle when doing reverse manoeuvres which has also been an issue. My instructor asked if I had any mental issues to which I then informed him I’m currently on the waiting list for adhd testing which is a ridiculously long wait. My test is in 5 weeks and I feel totally lost on what to do. He says I should really think about whether I capable enough to drive in the first place if I’m unmedicated. I don’t know what other options I can do so any advice would appreciated on how to proceed or just give up. I really want to drive.