When you are writing a post there is a button on top of the box (a couple of inches above the text box) it reads "choose file" you click on that and then options for ways of posting a pic come up. First get your plant in something with drainage holes or drill a hole in your pot. It would really help to have a pic to see what type of soil you are growing with. Then we could assist you more.

They need lots of sunlight. Maybe still not enough indoors. Any obstructions (trees or other vegetation, curtains...) will make light 'indirect'. I think that spots may have started as mechanical injury; but check 2 bigger ones if the leaves or spots themselves are soft. If there is a scab over, it should be OK. Otherwise, maybe even remove those leaves. Make sure the potting mix is thoroughly dry before every watering; use bamboo/wood chopstick or skewer or even pencil to test deep inside the pot. Bottom plant doesn't look that great - hopefully only because the protective powdery coating (often referred to as 'farina') seems to be rubbed off. Try handling the leaves as little as possible. Check the leaves if they are soft/limp - they should be quite turgid. IMO, it needs more light. If you have access to any outdoor space, they would benefit being there - but do not put them into sunlight suddenly or they will burn. Outside light is more intense and plants should be acclimatized. Can't tell for sure how low is the soil level in that pot, I like plants sitting higher so no leaves are really inside of the pot, if possible.

First, don't do any treatments until you know for sure what it is. Fungal disease should be treated with a fungicide. I had some fungal disease on one of my aloes and treated it with powdered cinnamon (natural fungicide). I wasn't 100% sure what it was, and couldn't get ID here either. What I did helped. I didn't isolate plant and it didn't spread on other plants either. It may depend on what disease it is exactly - I am not sure. Rot usually spreads thru the plant, not really on other plants unless in same pot. It usually happens with overwatering, and culprit may be/often is water retaining soil. Depending how bad it is, it may be good to cut off infected parts, repot, check the roots...

I don't believe it is oedema. I don't think it is sunburn either - but possibly. At least on first plant. Ppl posted photos of similar damage, and it is likely caused by something chewing on it while still younger. Those 'bites' have scabbed over. As the plant grows, rosette opens up more and damage is more visible. You can see it is sort-of regular. Very young growth is usually most juicy/succulent, and it is often first to be chewed on. One doesn't have to see the bug or pest for it to happen...and just because other succulents were not damaged, it doesn't mean it didn't happen to this one. I actually witnessed this to happen. As Dominyka said, those leaves will eventually grow out, and plant will look better. April If you don't mind here is a suggestion: hope those metal tins have drainage hole(s). If not, they should be drilled or poked in. And if possible, top up the potting mix so the plants are not so deep inside of them. Metal heats up more than terracotta (didn't compare it to plastic); and plants are even 'hotter' if they are deeper inside. And it restricts air circulation too.