l got 37.526 in jee main 2020.which college l will choose

Hello,
You haven't mentioned paper 1 or paper 2.
However, your expected rank for paper 1 can be calculated using the formula given below
(100-your total percentile)*869010/100
869010 is the number of candidates appeared in JEE main January session paper 1.
So it will be (100-37.526)*869010/100= 542905
your rank will be around 542905.

For paper 2 the formula will be (100-your total percentile)*112679/100
So it will be (100-37.526)*112679/100=70395

So with such rank you don't have chances of getting a seat in any NITs.You may not qualify JEE main too.It is better if you prepare for JEE main April session.