tile is pretty easy. toughest part is getting your thinset mix correct for the tile, location, and the consistency (thickness) of the mix. I almost always mix it a little thinner than I intend to and it makes me hate life when I go to hit a vertical surface.
Home Depot has a Rigid 10" compound mitre for $180. Or the big dog 12" sliding compound mitre for $500. The 10" is probably sufficient, just don’t waste your time with 7.25 stuff unless it’s a regular circular saw.