Started my business 3 months ago, do I need to file quarterly taxes?

I started my single member LLC in July 2021. I did not elect S-corp.

 

Is it true that since I started my business in July 2021, I don’t have to start filing quarterly taxes until next year (2022)? 

 

And so, I only need to pay Self-Employment Tax for the 2021 year?  

 

Thank you.