What to do?

I started a compost bin 3 years ago. Around 3 months ago I added 100 red composting worms to the bin and now I have 2x the amount of worms and they are doing well. My question is what's next? My bin is just a large garbage can with a lid (big one on wheels.) How do I go about getting the worm castings out for my garden? I'm guessing the only way is to dump the entire bin over and separate everything? This is how I would mix my compost before having worms. How do I keep the worms happy? Do I add more dirt after removing castings? New to this and should have probably researched more. It was an ADHD impulse project but I'm enjoying it, TIA.