I'm new to these too, but wanted to share something that helped me (a stereotypical always-recovering over-waterer,) keep most of the plants alive so far, I got about 100 various succulents last winter/spring. Even some growing and blooming in this awful monsoon that's usurped summer here. I wish I remember who said it to me. I don't, but when they did, these plants made more sense to me regarding propagating especially. Paraphrased, the info was, "the search for water is what forms roots, not actual adjacent moisture."
Because it's such a fine line between having enough moisture present for survival and rot occurring so often when I add any, I've had much better results propagating in pots and spots where there are already plants with root systems. Then I can moisten the surface often when watering the pot, but it dries so much more quickly. The next best thing is to pack them in as closely as possible so the minute amounts of moisture used add up to at least slightly faster drying of the pot as a whole. Something really shallow, like the drip saucer of a regular pot seems to work better than the actual pot, if it's a pot of nothing but propagation attempts, little snips and single leaves. I've gotten a few boxes of stuff like that in trade, and for postage.
Not everything has been successful, but really great things (IMVHO) are happening in a couple aluminum baking pans, cheap, don't get too hot in the sun, shallow, easy to put whatever holes I want. I have to move these at least twice a day for the past 2 months so they don't get rained on constantly. If not for that, I think a lot more stuff would still be 'in there.' In the spring, some separating and spreading out should hopefully be needed for these babies in 'diaper pans.'
Pots with older plants, newer plants, and recent propagation attempts through holes in the side of the one on the right. Did that about 6 weeks ago, pic last week, so going pretty well although too soon to officially pronounce everything as a rooted plant yet. Well, the preview is just part of a fence, the plants are hanging on both sides:
