I’ve always just checked for rocks, wash them, then put them into a pot of water on low heat for a few hours on the stove. Just add salt midway through and check periodically.

Side note, if you prep em this way wait a bit for the water to get to a soupy consistency. A really easy and cheap recipe my mom always made when I was a kid:

Ingredients-your beans you just cooked, tortillas, and Chihuahua cheese

Pour some of the beans with the soupy water into a bowl. Heat up some tortillas and then tear them into small squares and mix them with the soup. Top with your preferred amount of cheese, preferably grated or torn to small pieces so it melts faster. Can also add salt, pepper, or any seasoning you like but it usually tastes good as is.

If you got time and wanna be fancy you can dice up tomatoes, onions, avocados and/or jalapenos and chuck em straight into the soup.