The better option would be informing your parents after you reach your desired location.Just let them know you are doing good and happy and try convincing them with peace.It may take time but its sure gonna help you.
As an indian your parents need the security *money*. A good future plan to follow your dream. Give them the assurety that you can survive and go ahead with your plan, make them trust your plan. Your parents want your happiness. Make them happy then take them with you show them the world. All the best 🤟