I’m sure everyone here has made good points as why you shouldn’t watch them - but if you go in expecting a decent Sci-Fi action flick, you might actually enjoy them. Don’t go in expecting to feel the same magic you felt when watching ANH for the first time. Expect to be slightly thrilled, mostly underwhelmed, and be prepared to scratch your head in confusion… a lot. They’re not great films, but there is far worse out there.
If anything, watch the films in 5.1, and disable the center channel. That way you hear the most important part of the prequels - their exceptional soundtracks.
The only Star Wars “film” I would advise that you NEVER watch is the dreaded Clone Wars animated feature. That was absolute garbage, whereas the prequels are nicely packaged garbage.