How in the world do I play Dr. Mundo? I'm trying to find a champ that I could potentially main, and Mundo looks like a pretty good fit(personally and because he looks like me ay lmao)

However, when I play him I tend to get shit on quite a bit, both top and jungle. I can't seem to find any guides on him that aren't horrendously outdated. I don't see him too much nowadays either.

I really want to play him though. Is he just in the crapper right now, or can I actually do stuff with him? And if so, how?