Hi I A A Very Busy Mom/caretaker With An Unpredictable

hi I a a very busy mom/caretaker with an unpredictable life and have no for sure schedule. I am having a very hard time keeping an appointment / or having to go with my disabled child and aunt. I was wondering if an online doc. is a legitimate way to seek medical care , how it works, cost, if insurance is accepted and how thorough it could really be. Also I was how if I chose this it works could you help me