learn survival skills

I’m trying different ways to get water, how to purify it, where to look for it, etc. I learned about water procurement, and now I’m trying it. So far, I just tried digging a hole and letting it fill up. I was excited because I got 2 litres, and didn’t have to dig very far.
I tried making a water filter, but it didn’t really work. The water came out just as brown as when it went in.