Hi I'm new to growing succulents and I have a few questions! Unfortunately mine have been through a lot because I'm a university student, so I had to take them home for the summer and then bring them back to school.
First picture: how long will it take for leaves to grow back on stems? Because the succulents were getting leggy, I cut the stems and got a grow light. I wish they were even shorter but I don't want to cut the stems too short and not have any leaves left. I'm trying to figure out if there are other problems keeping the leaves from growing back because they've been like this for a few weeks.

Second picture: any idea how to fix leaves that are curling downward? I thought the problem was dehydration at first, but they didn't improve upon watering and the leaves feel still feel firm.
Any help would be much appreciated!! Thanks :)

Start by taking them out of the glass jar and potting them in something with a drainage hole. Use some soil especially formulated for succulents and cactus. Mix some perlite or grit into the soil (maybe 3 parts cactus soil and 1 part perlite).

Cactus and Succulents need to have a drying out period between waterings. In a container without drainage, that's not possible. The soil you use must be fast draining with the ability to absorb moisture but dry quickly.

They may not grow new leaves until next spring.

Thanks so much! I have cactus/succulent soil and hopefully can find a new pot, so I'll re-pot them asap.

That's good to know about the leaves--I would've been worried otherwise.