Internet Archive just announced that waitlists have been suspended until at least June 30, and perhaps beyond. So all those yellow diamond books on the Libraries of Hope website have just been opened up! You still have to borrow the books (i.e., you only get them for 14 days), but there are no longer waiting lists. This includes My Book House and Junior Classics.
Just pick a story and read! It really is that simple. Don't overthink and overplan and try to turn everything into a lesson.
Stories are one of nature's simplest and most effective means to learn in childhood.