Easiest and hardest part of surviving in the wild

If I was stuck in the wild for several weeks with only the supplies i had with me on the day i arrived, the first thing i would do when i arrived would be to build shelter using branches from trees, moss and rope. I would build a fire, then drift to sleep. The next day i would craft my own bow and arrow using a small knife i had in my bag. I would then hunt or gather food. I would search for a water source,and proceed to build a dam out of rocks and branches. Which would eventually trap fish and slow water flow. Doing all this would make it so i have shelter and multiple ways to get food. So, getting food and gathering food would be the easiest part. I think falling asleep not knowing if you would have to live another day of hardwork in the wild would be the hardest part. Always having that feeling of uncertainty. And not knowing what could happen to you the next day.

Easy- food and shelter
Hard- Mental part of survival