Pls remove the moss, holds in moisture & IMO bacteria, neither are good for your succulents.

This pot may be too deep for this plant, I doubt its roots are so long as to require that height.

I think you have a Jade plant, Crassula ovata.

Yes, as Karen said, remove the moss right away because succulents do best in DRY conditions. Pretty pot, but it should be about half as deep. You will have to be extremely cautious with watering because of the depth and because it is glazed ceramic. It will dry out more slowly because of these conditions. Rocks on top of the soil will only keep it wet longer so don't do that. To determine if its dry and needs water, stick in a wood skewer for a while, then remove to see if it's damp. If damp, don't water, your plant is ok. Needs lots of light too. Good luck, nice little plant.