I've tried different ways to launch the game, but each time, it always appears to be in a glitch-like picture? The image moves, but it's not clear as to what I'm looking at. Is this intentional...?

That doesn't sound right. You should see the logo, and then a title screen with a menu. When you start a new game, you should find yourself in the same room as the title screen.

Please can you let me know your system specs?

Also having this issue: can't select anything on the title screen. Windows 10, 8gb RAM, AMD Ryzen 2600X, Nvidia RTX 2060.

Hmm... I wonder if this is a screen modes problem.
Please can you try the fix on this thread? Thanks!