Can someone teach me good things to do with lentils?

Hello! I've never had lentils before and am interested in recipes and also eating them plain. Some things I've read said you have to soak and cook them for a certain amount of time for toxins to reduce? I'm new with any legumes not from a can and would appreciate and help you can give me. Also, when sorting, what do I look for? What spices are best with lentils? Your favorite way to eat them? Thanks!