When succulents are indoors it’s often hard for them to get enough sunlight.
They generally about 3 hours a day. You’ll want to keep your plants as close to the window as you can, but be careful not to let them get sunburned if the light from the window gets too hot. This tends to happen most with south facing windows (which tend to get the most light if you’re in the northern hemisphere). I’ve kept my succulents in an east facing window, right up against the window, and they have done really well. If your succulents aren’t getting enough light they will start to stretch. colourful Echeverias are especially prone to stretching indoors. If there isn’t anywhere that gets brighter light (or more hours of light), don’t worry! After it get’s too stretchy for your taste, just cut off the top and propagate it! The bonus is that you’ll also get more plants :)
Soil : Succulents should be potted in a fast-draining mixture that's designed for cacti and succulents. If you don't have access to a specialized mix, considering modifying a normal potting mix with an inorganic agent like perlite to increase aeration and drainage. These plants generally have shallow roots that form a dense mat just under the soil surface.
Fertilizer: During the summer growing season, fertilizer as you would with other houseplants. Stop fertilizing entirely during the winter.