Trying to learn how to take care of plants, advice welcome!

Hello! I posted a few days ago on !houseplants@mander.xyz and one of the comments mentioned there was this succulent-specific community so I figured I would post here as well! So for a bit of background I have a black thumb, I've tried caring for plants in the past and they always seem to die on me. I'm trying to change this! I bought a handful of succulents and am trying to figure out how to keep them alive. Any advice is welcome!

The succulents: dwarf jade, panda plant, echeveria elegans, split rock, and there's one more that I'm having trouble identifying so if anyone recognizes it please let me know! It's the spiky one.