I’ve moved this to the https://community.ubuntu.com/c/support-help-requests category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the https://community.ubuntu.com/t/finding-help/712 page.
The short answer for new desktop hardware is: Plug in a keyboard and monitor, boot an Ubuntu LiveUSB, and find out if the hardware works out-of-the-box or not. It’s free. Server hardware can be a little trickier simply because Linux servers tend to run headless - that’s a training-and-skills issue (if Desktop runs on your server hardware, that might ease your learning curve a bit). Nevertheless, lots of folks in our help forums have lots of experience with this kind of experiment, so fee free to jump in there and ask.