Now here's an idea. A simple, quick, and free one.. After each driving lesson, summarise for yourself what you did. And, more importantly, how you felt. Start with where you "were" before the lesson, and end with "where you'd got to" after it ended.
You don't have to write it down straightaway. Just do it in the following few hours. And keep it short.
But here's the vital part. You must do it without using any of the following phrases: "At least I didn't ...", "I stalled N times, or the word "but".
A few weeks on, look back to see how far you've come, and how positive you can be about your own driving accomplishments !