Make space for your mat, removing all potential tripping hazards, like the cat, or the rug.
Pay attention to the teacher
A good teacher is constantly giving verbal cues, including telling you what body part goes where and how to stay safe. Listen to them, they are the experts. If your teacher isn't doing this, find another.
TAKE CLASSES AT YOUR FITNESS LEVEL
Know your limitations
Trying something new from home can be fun but stay within your body's range of motion and appropriate exertion levels. Wait until you are in the presence of a qualified teacher to try your first chin stand.
FIND SAFE PROPS
Stick with Sturdy
If your prop is wobbling, you will too. Be sure to choose props that have some weight to them and won't tip when you need them most.
And utilize the expertise of live, qualified teachers who you can actually speak to, and who can give you advice based on your needs.