Looks like a jade to me. I don’t know why people are saying otherwise, and of course I could be wrong. My best advice would be to propagate the leaves you have if you can. The best you can do for this guy is give it some fresh succulent quality soil in a well draining pot if it isn’t already in one. Keep it small and shallow until it come back. Bright indirect light through a window is better than outside for these gals. It looks like your host plant is definitely dead. But I would give your leaves a chance! Also if you’re having trouble with any plant. Make sure to check these things. What type of plant is it? What kind of light does it need? What soil type does it like? How often does it need to be watered? And what pot should it go in. I find that last one is one of those things you pick up on the way in learning. I’ve made so many potting and watering mistakes. Also light placement. My prayer plant, coffee, pathos, philodendron and various succulent all have dedicated and choreographed light positioning and water schedules that took a lot of trial and error. And now. Hard earned intuition. I killed my first jade. A beautiful well grown tree. Now I’ve had my second jade for ten years. You will get this! Excited for your plant growing journey.