Ah, yes. Your enthusiasm has put you in an unenviable position. The instructor must review the material you already know; and in a typical class there will be some students who are only minimally prepared. New information should be presented about local conditions and logistics, but otherwise you’ll likely be bored....The book was woefully uninformative (hoping the instructor led portions are better!) and most every topic discussed I knew, ...
The only solution to this I know (besides being infinitely patient) is to find an accommodating instructor and pay for private lessons. One of the most enjoyable OW classes I ever conducted was one-on-one with an enthusiastic 12-year-old who asked myriad questions. We quickly did the mandatory reviews and tests but spent lots more time in discussions. I had to do outside research on several of his questions, and we both had a blast. But not all instructors enjoy this type of exchange. I got him as a student because his original instructor couldn’t stand him.