maybe you haven't found your genre yet, try to explore different genres and start with smaller books 100-200 pages, there are many good books out there contained within those pages.

I prefer to read nonfiction while being very attentive too, and i mostly highlight them at points so i can look back. However i am making a habit of writing down about it once i finish the book, so if you want to write notes you can do it at the end of each reading session.

last year i did bingo reading challenge from Goodreads, where you get randomly generated card with various genres so i got to explore them.

this year i am doing a challenge to read around from different countries, as diverse as it gets. it's pretty fun browsing books and learning more about authors.