Hi jboy and welcome.

I would advise starting at the beginning. You may be surprised at the things you pick up. It will also highlight any bad habits you may have picked up and help you rectify them.

So go through Fundamentals 1 and 2. This will show you how far you've already come and give you an idea of where to go next. (Blues, Country, Rock whatever your fancy)

Depending on the level you are already at, you may be able to skim through the Fundamentals quite quickly but I bet you will pick up on some good tips and expand your knowledge.

Look at it as a refresher course and then go from there.

Kind regards

Joe.