I started 3 months ago with seeds in small dome trays. They are all growing but I am noticing slightly color changes on some. I do have them in a small green house and I find the top soil is dry everyday now. I am in Louisiana. It's hot and humid here. I am also concerned about the cold winter months coming ahead. The green house is just that. No ac or heat. The trays they are in have ventilation holes on top I have them closed rn when do you open. They are very small seedlings rn. Also, my leaves that I was propagating were all doing good till I moved everything into green house. Maybe I shouldn't have them on the side that catches the most sun. They have all wrinkled. I was watering them every few days, that maybe what killed them too. Idk I'm so new to this.

That is pretty bold and ambitious for a start with succulents. I admire your attitude. I guess two things sort of leap to mind, based on my experience and what I have read.

Environmental stress from changing locations can be difficult for very small plants. You have special challenges with heat and humidity that are going to require adaptations that give your baby plants some relief. I like to keep leaf propagations out of direct sun (especially near midday) because they have no way of rehydrating until they grow a decent set of roots. Filtered light or morning sun, something like that ought to be good.

Did these plants which are now in the greenhouse come from indoors? Was it air conditioned in there?

Is there air flow in the greenhouse? What are the high and low temps in there right now?

High 90s low 70s so far but the cold weather is definitely coming. I had them outside prior to the greenhouse. They had sun but not direct. They were just under my patio. No ac or anything. I guess opening vents in greenhouse would help.