The game really doesn't go easy on you. I just kinda wish there was a way to either separate hp from ammo or had a method to restore hp.
Anywho, here's my channel for other games I have played. http://www.youtube.com/c/Levont
There is a way to restore your HP, but it's relatively rare.
The first impression might be false, because the game is easy. And it gets only easier. In the second half of the game you'll be able to get as many bullets and HP as you want.