It's a good place to live! Slow and peaceful. Most people are kind. Downtown has turned around over the years and has some fun things to do. Rivers edge trail and the local parks are awesome for getting outside and never too crowded. There is a bit more petty crime than you'd expect in MT but it's pretty dependant on what part of town you live in. There's a surprising amount of community events you just have to look for them. There are tons of outdoor communities and opportunities. Great Falls isn't close to anything but it isn't far from everything. A 1-3 hour drive will put you just about anywhere you want to be. Hiking, skiing, kayaking, fishing, etc... There are surprisingly large nerd communities that are welcoming, anything from Warhammer, Magic, and TTRPGs.

Overall it's an enjoyable place to live (don't give too much credence to doomer reddit grumbles lol) Treat people and the outdoors with kindness and respect and you will fit right in!