You should join us on the film and medium format boards. It seems there's a lot of nice color film out there, none of which have I tried. (my film work is mostly black and white, and has been for, well, pretty much decades.
) Probably, you may as well start with some of the less expensive stuff, like basic Fuji, and shoot a test roll with that, before you get too fancy.
Oh: General suggestion: Watch your depth of field: sometimes going to medium format'll fool you about that, cause it'll 'look' like you're using a shorter focal length than you in fact have on there, depending what you're used to.
Also, if you have a good one, take some tripod shots. I think you'll find you're in for a treat.
Also, depending what you come by, you may need to find a 120 magazine/insert/'film holder:' (they're called several things out there) sometimes they'll come with 220 ones or none at all. (you can still find 220 film, but it's getting harder and there are fewer choices. Same stuff, but more exposures, and to get proper focus you need the right magazine, because there is no backing paper behind the film in 220, (it's taped onto the ends) which is how they get more film on the spools. Just something to watch out for. )