Welcome back into the hobby! You do have some hard water there, but that's not a big problem. African cichlids would do well in it, but I don't know if they are your thing. Guppies and other livebearer do well, too, but aren't for everyone due to that pesky habit of breeding like flies.
But there are some neat hardwater fish that have come into the hobby recently. A lot of them are small, colorful shoaling fish. The Asian rummynose barb (Sawbwa resplendens
) is my favorite. Emerald dwarf rasbora are also gorgeous. For some bottom-dwellers look at the Inle Loach (Petruichthys brevis)
or some of the captive-bred corydoras species as they can tolerate harder water better than the wild-caught ones. A lot of rainbowfish are hard water fish too (if memory serves me right).
Hope I've been able to give you some good ideas!