Welcome to the land of freedom, Nor Cal implant
I can't tell you exactly what to buy as far as a hunting rifle. However, I can tell you some places to buy one and where you can practice with it. I don't know which part of Missouri you're moving to, but I can tell you some details about the Kansas City area gun resources if you are moving here or participate in firearms activities here.
There's a Cabela's across the state line in KCK. Of course, their selection is good.
Show- Me Shooters is a smaller gun store run by a guy in Claycomo, Missouri. A pretty good place. Where I bought my Saiga. I'd say he does business fairly. He also has a very nice range there for handgun practice.
Another place is Denny's Guns in North Kansas City. It's not as organized as Show- Me or as smoke free (it was reaaaaaaaaalllllllllllllllllllllllllyyyyy bad before they got a HEPA in there... and they hide that in a corner
), but the store does have good connections to local shooting clubs.
The Bullet Hole is a gun store and pistol range in Overland Park, Kansas. It's an okay place. The range gets
incredibly cold during this time of year, though, and it isn't as nice as Show- Me's range.
The Missouri Department of Conservation operates two ranges in Kansas City. One of them is the Lake City Range (same name as the ammunition plant in Independence). It is a full service place, with a shotgun and rifle range. I haven't been there, personally, but if it's anything like the next range on the list, it should be very nice.
The range I usually go to with my dad is Parma Woods in Parkville, Missouri. It only has a rifle range, but it is very modern and sheltered. The only parts I don't like about it are that it is supervised and that bi-metallic bullets aren't allowed there.
Welcome to Missouri.