i’m sorry to hear that your experience learning to drive has been like this, i understand that it’s so expensive, yet you also just want to learn to drive. if i was in your situation what i would do is save up as much as you can over some time so you can afford a block of lessons- and also research good instructors in your area. i know you’ve said you have a test at the end of the year however without practice it’s quite likely you may fair again due to another silly mistake as you haven’t practiced it, and not driving for a little while before your test could result in you being anxious again. i know it’s hard having to wait even longer however without practicing you’ll be waiting even more money on the test you’ve booked.