Consider Alaska. You can buy a remote cabin and be very secluded. You can hunt, fish, and forage. Norway's landscape is similar to AK- boreal forest, tundra, mountains, glaciers, fjords. If you are not moving to Norway to be with people there than AK would be much more practical. And if you need to get a job in town for a while to support your wilderness living, there are lots of seasonal jobs availability both in summer and winter.
Getting a visa in Norway to stay there and live off the land would be impossible.
Another option- marry a Norwegian.
Happy travels!
It is very difficult to get a visa to live in Norway as a foreigner. You would not be able to just build a cabin anywhere. You'd have to buy the land or buy the house and pay taxes on it. And you'd need to be a legal resident in order to get any sort of utilities (electricity, gas, water, phone). And you can only farm a few months a year due to the weather. What are you going to do October - April when it's too cold to grow anything? You can't just survive on fish
The primary difficulty is getting a residence visa. Unless you have advanced educational and professional qualifications plus speak/read/write Norwegian fluently the only realistic way for you to stay in Norway long-term is to attend university on a student via. Really.
How good are you at dealing with extremely cold winters?
You won't get a visa.