I read an article about mixers, and it looks good on paper. The question is how to find a legit mixer?

You asked this question here, and that's a good way of looking for services like this. Here's a list of the best bitcoin tumblers . You can trust this reviewing website and you can pick pretty much anything from the list I've shared.  All the mixers there are tested ad reviewed.

Okay. I will trust at least one link from this website. Thanks for sharing it here.