I got 180757 in Mains 2019 in obc Im not expecting any NIT or IIT which colleges I will get.

Sir as you mentioned that you have secured 180757 rank in JEE Mains accordingly you have not even clear the cut off for JEE Mains 2019 which is 76.31 percentile for obc category, so you will get very low level colleges if you apply through your JEE Mains score, try for private institutes such as srm

Chances are that u might get NIT or some state University but not a good branch.