1. Focus on your talent - in this case singing - how can you work and improve on this (singing lessons/singing coach) - discover what kind of music suits your voice and what you enjoy
2. Get involved - use your skills as much as possible - perform and sing as much as possible - research what singing groups are available in your location and think about joining local group - this will help you build on your experience and building visibility; audition as much as you can
3. Expand your knowledge - for example learn to read sheet music - to be considered a professional, there is an expectation you can read music; think about learning an instrument - this will also support reading music, but it also means you have multiple talents
4. Creating a brand - so much in music is done online - how can you use social networking platforms/creating a website to share your music and talent. Singing is also more than just singing - its about stage presence, connecting with the audience
Hope this helps you start thinking about some things you can start looking into
Good that you have chosen a different career .Singing is really enjoying but as you are focusing on to become a professional singer ,I am suggesting few things:
There are music educations available in India as our country history also emphasizes on the music. So to start the career in particular area you have music schools and colleges to start with .(check for the resources from Google regarding music schools and colleges ).They train you not only on vocal but also you can get overall knowledge regarding music .
As you are starting this ,we have some karaoke apps on Google playstore or IOS store ex:STARMAKER,SMULE etc here you can practice and listen to songs which you have sung too.(it will be fun too just give a try)
Recently Whitehat also has started the music classes online in their website ,please do refer .
All the best.
Thousif recommends the following next steps:
Given your location, I would suggest you start with joining a class in Classical Singing, be it 'Indian' or 'Karnataki'. The classes would not only help you on how to train your voice but also would provide you with a platform to represent yourself and have a start from.
Hope this helps.