How do i improve ttfb for my website

Hello,
I develop the web app on asp.net core mvc and the database is huge on it.
So i checked in inspector of browser so the first touch on website browser is taking so long time.
My website is optimize but its load data before showing to client. Its fetch almost almost 500 rows from table.
So how do i show speed up ttfb.

Or how do i cache query results ?

Please help me I didn't find proper solution for it.

Thank you,
Prathamesh