The Espostoa is either lanata or melanostele, those are the most common ones seen The 2nd looks like some sort of Opuntioid maybe

When it might flower depends on what species it is. And also on where you grow it. Cheiridopsis are very roughly winter growers but in many areas winter is too cold and dark for them to grow, so they either flower in autumn or spring or maybe not at all. I wouldn't expect flowers on your's until next "winter" at the earliest. They need almost no water in summer because they will be dormant, although they will probably still be plump and green. It is normal for the older leaves to die back in summer, generally leaving just one pair of leaves on each head. Eventually the plant will clump up so that you will get a mat of many heads.

I will leave identification to experts here, dioncox. For future reference you can avoid confusion by placing all pics in one thread and numbering them 1,2,3... Nice plants! ez

I would start off with morning sun:). At about 11am the plants should move into some shade. I'm not saying everyday at 11am go outside and move the plants into some shade, but put somewhere outside where the sun shines until about 11am or even till 12pm then the plants get shaded. The afternoon sun is usually what burns the plants. Unless you live on the equator and even then morning sun could burn plants;). Do this for a week or two. I have a feeling full morning sun will be enough for the echies, but that cactus can take all day sun. The two above get all day sun:). So after about about one or two weeks of morning sun move the plants into more sun. A spot where shade comes at like 1pm/2pm. Do that for a week. Then move to a spot where the shade comes at about 3pm. Do that for a week or so. If you get no burns at the 3pm mark, they're ready for the all day sun:). Does that make sense. It's kinda hard to explain. Your mix looks fine so your good there:).