Please put your safety first and foremost. Some young people I know only fear ridicule, or a little bit of trouble and fighting if their parents found out. Some folks won’t tell their husbands or wives because they are embarrassed. These are times where you might hide what you are doing and still practice witchcraft. Though I think being honest in these situations is still the best policy—a lot of the embarrassment and fights can be worked through and your family and you can end up figuring out how to co-exist reasonably.
But if you could be kicked out, beaten, emotionally abused, or similar, please put your safety first. Witchcraft will still be there when you are more independent. Don’t focus on witchcraft now, focus on getting independent first.