Hi, BlueLotus, and welcome to SitePoint.
I've moved your post to a new thread of its own. You'll find it much easier to get help here if you post in the right section of the forums.
If you just need a brief refresher, you might find the SitePoint Reference is enough to get you started again.
If you're looking for something more in-depth, you'll find a wide assortment of books and courses available at our sister site learnable.com/. There's sure to be something there to suit you.
And, of course, you've already found a great community who will be willing to help you out if you get stuck.