Succulents need to be potted in very well draining mix - best if repotted after purchasing - and pot with drainage hole(s).

Watering frequency depends on temperatures (cooler it is, watering should be less frequent) for typical home-growing plant. Some are winter growers, some are summer growers. But even plants that are dormant during winter will grow at home, where temps are relatively warmer during winter.

Very simple test: get a wooden/bamboo skewer or chopstick or thin dowel, or pencil. Stick it deep inside of pot - at least 3/4 deep. Leave stick in for about 10min (some ppl leave it longer, or even all the time). Pull it out: if dry and clean = time to water. If there is still lots of moisture, stick will be damp/cold, and may have small particles sticking to it. In that case, wait few more days; repeat and water only if dry.

AT THE SAME TIME: lift the pot before watering (when stick is dry) to feel how heavy or light pot is. Do the same after watering. You should be able to tell difference after a while, and may not need stick test anymore. Some ppl test with their finger; but IMO, it is too 'chunky' and usually can't reach deep enough. Especially with small pots. Testing just top of potting mix is often not enough - mix could be damp/wet/too moist in lower part of pot where you can't reach.

Do not leave pot sitting in the saucer or draiholeless cachepot while watering. If using those, let it drain first for about 1/2 hr, and insert into cachepot or put on saucer after excess water drained.

Mos succulents need lots of good light.

If you have plants you are not sure about, post a clear photo for more help.