I bought a generic gravity fed stainless water filter system

this is the first unit ive ever purchased of this kind. so if im asking the wrong questions, please help me ask the right questions.

with it being a name i've never heard of or even googling doesn't come up, I have very little faith in filters on it. was wondering is there a go to set of filters everyone agrees on in this community? and what expectations should i have for them?

does a filter set exist that i could just grab creek water and drink that from it?

I used a life straw before. i kind of thought it was much better than drinking creek water straight, but probably wasn't a perfect solution.

the unit i got looks like it is probably a direct clone of a purewell.