pdf to tablature for a guitar

You can certainly try File / Import PDF, ut that is very experimental and imprecise technology. You will generally get better results faster just typing the music in yourself.

Once the music is in, then indeed, converting it to tablature is a piece of cake. Of course, MsueScore isn't a professional guitarist, it might not the smartest choices for how to play any given note (most can be played on multiple strings) so you'd probably want to spend some time tweaking that.