Others have already given you great answers, but I wanted to add some things. I would try to identify particular things you might be interested in, like safety (since you mentioned the US is currently too violent), access to healthcare, education, etc. Then, although they're frequently imprecise, just to have an idea, I would look for rankings or statistics about those things, such as crime rates, homicides rates, etc.

After that you might have a shorter list of countries that meet your criteria. Then I would try to learn more about what is life like in those countries, learn about their culture, languages they speak, working opportunities, etc. And by then, probably you'd have an even narrower list of countries you're interested in.

By this point I would start learning about the immigration options for the countries you're interested in, and see which one fits better with what you can do to move there. Some countries are very open to foreigners, specially if you're very skilled or have a lot of money, also there are student visas, working-holiday visas, etc. Doing your research very well is crucial in this step, that's how you avoid being scammed. I believe the most important part is identifying which type of visa is the best for your case, and that you fit the criteria. After that you start the migratory process which has its own set of things to consider (beaurocracy, timing, housing, jobs, language learning, etc.).

Wish you all the best!