Hello, I am a singer. I am living in Ahmedabad. and I am looking for an opportunity to perform in any event or to join any band. I can sing Gujarati and Hindi semi classical songs. I have taken training in classical music from Harsh Patel in Ahmedabad.

Hi
Try to attend a few gigs in your city. Understand the opportunities available.
Find a few fellow musicians. You can ask your school/college mates. Or if you don't know anyone, go online on social platforms. Try to reach out to musicians. Ask them to jam with you from there thing will either build up or not work. but keep looking it's a time consuming process. Have patience. Nothing happens over night.

Meanwhile, build your profile. I can't emphase enough on how important that it. Every one you reach out to will ask for your profile. You don't need a good camera or studio recordings in early stages. Eventually, you will have to invest in it. But right now, just practise songs & post them on your socials. At least you will be able to show the musicians you want to approach that you have the potential.

That is all that matters.
Best of luck