Firstly it would start by me going camping. Something would go wrong and I would be in the middle of the wilderness with nothing but a knife. I would have to find ways to survive now.
Since I have a knife then I would be decently ready for everything. Firstly I would start a fire to keep me warm and to cook food. All I would need is a piece of flint which you could find in the wilderness. Then I could use the knife to make this fire.
Then I would need to build a shelter. I would need to get big sticks and leaves. So I could make a kinda hut on a tree. I could make this hut out of wood and then surround it with leaves and pine straw. This would keep me warm I also could make a pine straw bed to sleep on.
Then I would need to get food and freshwater before I sleep. Water is the most important right now because I can only go 3 days without it. I would try to find a stream or a little pond. A stream would be the best because fish would be flowing down and it would be fresh stream water. I would make a spear using my knife and catch a fish and find something to transport some water. Hopefully my shelter would be nearby.
Then when night came I would try to sleep. I would also try and stay alert because of predators. If a predator comes near I would try to get a fire going that would hopefully disway it. If all else fails I could fight it if it isn’t too big and hopefully I would win and get a bunch of meat and hide.
When the morning came I would firstly get to work on making a canteen. So I could transport water to and from my shelter. I would also try to make a better bed because pine straw would not be the best. I would also try to make a blanket of some sorts.
Then I would pack up everything I had and try and hike away. I would try and hike out of the mountains if thats where I am. I would try to find some sort of life and then escape back to the real world.