Hey seporpn, welcome to MN! One of the very first things you'll learn is that we Minnesotans are very defensive about our state lol ;-) We have many lakes and wonderful opportunities to fish for many great species. One of the best things about bass fishing in MN is that you are, in a sense, the minority as most fisherman here target walleye. This is a wonderful thing! There is much less pressure fishing for bass here than you are probably used to.
My advice is to ignore those people and keep watching those YouTube videos! Any information you are able to have at your disposal is to your advantage. Sure, some things may not work as well as down south, but that doesn't mean it won't work at all.
I would also advise to not, however, run from those conversations. Fishing for walleye is different than bass fishing so anything you learn along the way betters you as a fisherman. You'll also catch many walleyes while trying to catch bass at certain times of day/year. It's really a lot of fun since they fight differently. If the bass bite is cold then you can always switch to targeting walleye and vise-versa.
Be prepared to have some toothy friends bite off your lures while bass fishing here. Small northerns inhabit the same territories as the bass you're targeting, especially using baits that move. While northerns are really fun to catch, the small ones can be a pain in the rear when the bite off your line or chew up your fingers taking out the hook.
Again, welcome to MN and I wish you luck!