Do you have a library card? At my library I can reserve the books I want, and if they don’t have them they borrow them from another library in their system, and I get an email when they’re ready to be picked up. I also use the app Goodreads to track what I want to read.

If reading physical books is difficult, consider audiobooks as well!

For something sci fi/fantasy but more a serious/intense story:

A Deadly Education / the Scholomance series

Project Hail Mary

For more feel-good sci fi/fantasy:

The House in the Cerulean Sea

A Wizard’s Guide to Defensive Baking

The Long Way to a Small, Angry Planet

Grammar