Acrobat 2020 Standard support

I bought Acrobat 2020 Standard and can find no support for it. All I see is for DC or at best 2020 Pro. I don't use Acrobat often and would frankly prefer a printed manual, but suppose that's out of the question. Where can I look to find what I need? How different is Acrobat 2020 Standard from Acrobat 9 Pro (the last version I used much)? Thanks.