I purchased Windows 11 Pro but still cannot use Remote Access from my new Macbook Pro to my HP comp.

Hi,

I just purchased Windows 11 Pro but still cannot use Remote Access from my new Macbook Pro to my HP Computer.  I type in the same credentials (i.e. username and password) that I need to login to my HP Desktop but it still gives me an error that the computer is not found when I try to use Remote Access from my Macbook.  What's going on?

Also, I call constantly the Help line and I got through only once.  The call dropped immediately with a weird recording saying that it was past work hours but there was someone speaking to me who got caught off.  Also then I call back and it goes on for hours without any answer.  I think there's some sort of AI security protocol being triggerd.  I'm not doing anything illegal I'm trying just to do my own economics research (I am a economics professor) using publicly available large data sets on my HP Desktop that I cannot run statistical programs on as quickly on my laptop.

What can I do to fix this?

Best,

Eric