Hello Bruce. Welcome to the forum. I am a retirement hobby guitarist myself, like quite a few others here. Many of us would agree that learning standard notation helps. There is no "course" as such for learning notation on the forum, but the Delcamp library of scores is graded in such a way that working through it in order would be useful practice for learning from other sources. In our "classes" subforum you should be able to find threads about how to learn notation.
To begin, please be sure to have a look at our welcome page
for more information about the forum and its rules. Once you have posted a second message you will be able to access all the mp3 files and videos in our recording sections, all the members' scores and levels 1 - 3 of the Delcamp score collection, and post your own scores and recordings. After 20 posts you may subscribe to the 020 usergroup with associated membership privileges including access to the higher levels of sheet music in Delcamp's library (see here
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Enjoy your visits.