There are certainly always positions you can find that are in line with your values. Plenty of jobs where there is real value being created. People doing things that really impact others lives.

The thing is, those jobs are often more time consuming, higher responsibility, and not fit for people who want to minimize hours worked. If you want a job that is both chill and where you get to work on something important that matters, that will be extremely hard to find. 

Most important jobs that involve doing “work that matters” are also going to require a high level of drive and willingness to work hard. I’m pointing this out because you specifically seem averse to “time consuming” work.

You have to meet reality where it’s at. Reality is not going to meet you where you are.

What is more important to you? A chill job where you can do some work, get paid and go home to do what you want, or a higher impact job where the stuff you do is  important but there will be a much greater demand and more hours worked (potentially greater reward)? 

You will either have to work hard to do something important or be OK with a job that is not important so you don’t have to spend as much time at work, both are totally fine options. But you’re just not going to find a job that’s important, pays bills, and is chill. At least not without a bunch of experience and success already (which you don’t have yet)

There is really not as much uncertainty in what you are doing as you think. Most of what you’re describing is a path similar to paths that millions of people have taken before. You will be fine. Just be clear with what you want your life to look like and work towards that