I dress decently but I don't wear hijab because I'm not ready for it. Is not wearing hijab makes me a bad Muslim or increases my sin?
1See: islam.stackexchange.com/questions/763/… Hijab is an obligation, and obligation means not doing it is sinful.– The ZApr 27, 2022 at 19:35
Hijab is an obligatory act. Allah has commanded believing women to cover. It is sinful to neglect obligatory action.
Following links might provide better explanation.