Social media (goodreads/tiktok/reddit)? Colleagues? Friends? Browsing the library/bookstore? Asking for recommendations from staff at libraries/bookstores?
BONUS: if you can remember, how did you find books you really enjoyed?
I realized a lot of my favorite book recs came from reddit. I was a subscriber of r/books and picked up some really good books there. Piranesi by Susanna Clarke is an example.
I now almost exclusively read books online. Check out Hoopla or ICloud. There are various ways to search fiction/nonfiction new/old releases read or audiobooks. I get free access via my local library.