It can't hurt to be able to get a tune from a page. It's SIGHT reading that is really hard to oblige yourself to do after ear-play for a lifetime. As long as you can still see and can buy a 30 to 50 dollar computer program, you can plug the notes from the page into the computer and then play it endlessly, play and sing with it and learn it by ear. Who knows, after a while it may enable sight reading! Join a Shape Note Group- that helps too, and is a ton of fun, and only costs the price of the book.