Chickadees like black sunflower, but although other birds do too, they eat other things. Cardinals, so I'm told, prefer safflower. Good quality seed isn't full of things birds don't like.

This is what I have:
It can be expensive, but you can start simple and add on later. It's easy to put together and feels very sturdy. So far, I only have two feeders and the squirrel baffle. Maybe in spring, I'll add a hummingbird feeder.