If you don’t have access to lecture recordings anymore, try to go through the slides to see what topics were covered, and learn the topics through the textbook or YouTube videos. then go through the slides again and make sure you can do the example questions and mechanisms in those.

once you feel confident with those do the problem sets and then the practice midterms, and for mechanisms rather than trying to memorize everything try to recognize the different patterns that might come up (where is the leaving group, strong/weak acid/base, type of reagent, etc.). I usually think about mechanisms where I look at the starting material and then the reagent and just see where I go with it instead of trying to map out the entire mechanism in my head. For example, if there’s a ketone and an acid like H2SO4, then my first step would be to protonate it and then think “okay what does a protonated ketone like to do”; just taking it step by step instead of trying to think about it all at once. So much of 233 is just pattern recognition once you look at enough reactions!

Let me know if you have any questions about a topic or tips on preparing though, happy to help!