You need to draw up & file your articles of incorporation with the MN Secretary of State and pay them about $100 - $150 for the privilege. Then you need to get a federal tax number from the IRS and then a state tax number from the MN Dept. of Revenue.
Seeing where you're coming from, with so little knowledge, why do you want to form any corporation, let alone an LLC? Do you know the relative merits & demerits of that vs. an LLP, or an S corp., or even a regular C corp.?
There are companies out there that will set up corporations for you, for a fee. Try Googling "The Company Corporation." I don't know anything about them except that I used to see their advertisements. They may or may not be reputable.
On the assumption that you are asking on a gun board because you want to have the corp. for firearms related purposes, why don't you look up the GOCRA/CCRN lawyer? You can probably Google him, too.
You should probably re-think the whole incorporation idea, though. There are a lot of forms to fill out every year, like the income tax forms for the IRS and the income tax forms for MN Dept. of Revenue. The point is that whatever you are trying to do might be more easily accomplished without incorporating.
Good luck.