Don't forget that ACCA is a professional programme unlike the university one, it's much more easy to pass in a university than in a professional context given that in a professional programme we must go through a whole subject and not sitting a paper based on a few chapters within a subject, there are so many differences between the two. I started university and completed only level 100 some years ago . I found out about ACCA at the end of this level, I then decided to stop the university and start over with ACCA as things at university were boring , not serious, so much time off, and above all I studied subjects not related to study field at the beginning... in a word I didn't feel university compared to the professional one, more challenging, more serious, more demanding in terms of workload... and I love it. Getting back to you, keep practicing and develop exam strategies such sticking to the timing... good luck
To pass P6 someone should have knowledge about tax and know how to apply the knowledge . So first study ACCA approved partner P6 study text and make your own notes like tax calculation Performa and other key rules of tax and then practice questions from revision kit to apply your learning/knowledge. Solve your revision kit two times before your exam.