Wait until Prime Day and they practically give the Kindles away. Then you can use the library to check out Kindle books without having to drive there. The vast majority of books I read are checked out of the library and sent to my Kindle without leaving my house. I only buy hard copies when I know I will want to keep the book.

I have the Kindle Paperwhite. No glare and it won't give you a headache like your Fire did. Also, you can probably trade the Fire in for a discount on the Kindle. I always send my old one in and get $20 or so off the new one.