Over the years, the homeschool scene has become flooded with websites to the point where it’s like searching for a recipe. A gazillion stay at home moms, mostly moms, that are busy, busy building the website and always have affiliate links that make them money.
It was pretty clean when I homeschooled 15+- years ago.
I don’t know any source for a listings of groups. There used to be some.
All I have to offer is the curriculum that we used. Robinson curriculum which uses Saxon Math in a self teaching way aka teaches them to look things up from previous lessons when they get stuck. It also uses the classics for reading material and the book list is all pro American, teaches morals and most of it is available free online due to being out of copyright.
We used the old hardcover book Saxon math right through Calc.
It is by far the best for math.