Since your parents are perhaps not supportive of your interests, the first thing necessary is to become financially independent. You should look for a job, possibly in government sector which will provide you with security and a stable base as well as give you time to pursue your hobby. It should not be so difficult to get into bank or railways. Later as you grow you can gradually transit slowly towards making your hobby as your main job. Don’t be impatient or in a hurry. The road to perfection and lasting success is not a shortcut but comes through painstaking perseverance.
With prayers for success in your endeavours.
Affectionately,
Alok Da