I honestly felt that the PPL exams would be terrifyingly difficult and there was no way I could pass them, especially if like me, you have been out of education for a decade.
However it turns out that writing out the key information a couple of times and then reading it over and over to absorb the relevant facts was enough to secure 100/95% in the exams. (For me at least).
Don't be apprehensive about self study, it will all begin to click together the more of the books you read and digest, and even more so if you do it alongside practical flying.