Plus it's planted far too deep inside that pot, the soil level needs to be much higher than it is at present. Planting deeply like this increases the humidity around the plant, especially so if it's growing in such a water retentive mix, and that promotes rot. Sorry to say it doesn't look as though it's been cared for else it would look much different to how it does now :-/

So, what to do.......maybe best to behead, let it dry for a day or so and try to reroot the severed top portion and some stem portions, maybe even the fallen healthier leaves too.....but, in a better pot with better soil, in more light and with the pot filled higher....no water till they're rooted either :-)

Gill

Karen R. Sternberg, the pot itself has a drainage hole and is connected to the saucer.

Gill, I will try to fix the soil and replant it in a different pot per your recommendations. Thank you!

Yes, pls change the pot 'cause I don't understand how a pot can be both: have a drainage hole & be attached to the saucer. The attachment suggest the water can't drain out the hole, so, it's good for you to change pots as this is a problem.

Maddy, May I pls add that we we don't mean to be such downers, unfortunately, the plant's had bad conditions so it's grown badly.

A bit of reading around here & some of our suggestions should help it get better & when you've learned better, you'd grow things better, so pls don't be discouraged, it's part of the learning curve for newcomers.

Karen, thank you for the recommendations and yes, I am a beginner at keeping plants and caring for them. I hope to take what all you kind and nice people on here advised and continue to care for plants. I cut the succulent off the rotted root and I am letting it dry out. In a day or two I will repot it with the right soil into a better draining pot. I will be sure not to over water it and to keep it in the sun. Hopefully it doesn't completely die (as I know it probably will). :)