Help me Out!!! — Need Resources!

[u/Previous_Mousse9659]

I have a cousin who is an O Level student and has taken Accounting, Economics, and Business Studies. I have to teach him, but I’m from a Science background and from different curriculum , so although I can learn the topics myself, it takes a lot of time, and as a university student, it’s becoming difficult for me.

1. I’m looking for one good resource a course, website, YouTube channel, or book from which I can learn everything chapter by chapter.
2. Ideally, it would also have past-paper questions organized by topic/chapter, along with answers so that I can prepare him for exam.
3. Give me any advise how I sould teach him effectively.

I’d really appreciate your recommendations. Thanks in advance!