Unfortunately, there are no generic suggestions I can offer because certain software providers keep getting more and more "creative" about the hoops through which you must jump before being able to actually download their software.
I am more than happy to take a look at specific sites on an "as needed" basis as that's the most effective way to see how it's operating at a given point in time and giving suggestions for getting through the cyber maze with a screen reader.
Brian - Windows 10 Home, 64-Bit, Version 1803, Build 17134
The real art of conversation is not only to say the right thing in the right place but to leave unsaid the wrong thing at the tempting moment.
~ Dorothy Nevill