Where did the goal of 50 come from? If you’ve never tracked your reading before, I would make your first year’s resolution be to track your reading for a year (a task in itself to figure out your best method if you have ADHD) and just read naturally. If you end up reading 10 books this year, then you can make a more realistic goal if you want to start bringing numbers into it as you can take your reading habits from this year into consideration.