@kidskylark Honestly?
Thomas' Calculus or Calculus by James Stewart.
Good, solid textbooks. I've never found a resource online that compares and still covers everything that you need.
Then you can go in for specific sections with various online resources and will likely have a much better time with the narrower query.
Endorse! I still use my 30 yo textbook when I need a refresher.
Look for one with problem sets and answers. my 1990s era Thomas is good for that.
Absolutely.
When I was in school my Calc III prof said "do not get rid of your calculus textbook (Stewart's). Others, sure, absolutely. But you will find that you regret giving up your calculus textbook."
It has traveled with me through multiple moves, the spine is basically destroyed from how much I have used the book over the last two+ decades, but I still have it and it is still worth keeping.