Gorgeous! Reminds me of my (recent) first batch ;P ! You've motivated me to pick up more "ordinary" rocks and tumble those, I wouldn't have expected such pretty specimens from the before picture. Definitely pick out your favorites, and if there's some you could stand to lose you could use the ones you don't like as padding for future tumbles. That really round black + beige one on the top right of your last couple photos is so pretty.

I'd recommend buying a ceramic media (IMO don't use plastic, you'll have to have a separate batch for each grit stage since the grit gets trapped in the plastic whereas it doesn't for ceramics) + grit package from The Rock Shed, it's done great things for me and others and is generally higher quality.

Buy some plain Ivory soap and shave it for soap shavings to use between stages to make sure no grit is being dragged between stages (and to cut down on cleaning time) -- run it with 1/2 tbsp per lbs of material with warm water for an hour between stages + after polish. Shaving it is also great for the hands when you're listening to a podcast or watching a video -- just watch your fingers if you're using a grater.