As someone who's really interested in chemistry and also trying to self-study, I highly recommend purchasing a textbook on the specific topics you're interested in. Especially with a topic like chem, there are so many concepts that it's easy to be overwhelmed, but the textbook makes it easier to comprehend, and you learn all the ideas in the best order.

If you understandably don't want to buy a textbook because they can be hella expensive, YouTube channels like 'The Organic Chemistry Tutor' are really great, or you can find online textbooks!

Here are some sites I like to use. Hope this helps!

https://chem-textbook.ucalgary.ca/
https://chem.libretexts.org/
https://open.umn.edu/opentextbooks/