how shd i find research opportunity ?

I am going to assume that you are a high school student in my answer to your question.

Depending on where you live, it's quite difficult to find a research opportunity as a sophomore in high school (I'm assuming?). In my opinion, I think that it would be better to speak in person with whomever is conducting the research so that they can get to know you on a personal level and gauge your abilities.

However, I would encourage you to get a job. It will help you raise money to pay for college, give you real-life/work experience, and it looks good on your applications. Along with that, maybe shadow someone in the field that you would like to work in some day. You can even shadow someone in a different field that you don't even know about.

Make connections with adults this summer, because it will help you in the long run. To help do that, you might want to volunteer or even speak to the adults at a social event. In light of recent events, you might want to look for things online. Like, create a LinkedIn account, update it regularly, and connect with people in your career field.

Overall, don't stress yourself out. Colleges know when you're purposefully doing things to impress them. Enjoy your summer, because, trust me, high school will be over before you know it and you might regret the things you didn't do.