Hello

As your percentile is 63, so wait for JoSAA counselling, then apply for colleges through this counselling, as you have not specified your category, so,

If you belong to the general category or EWS,  then you are not eligibile to take admission in IITs, NITs, but you can apply for other good private institutions.

If you belongs to ST or ST , then your rank and percentile will be considered for admission in NITs.

Some colleges acception 63 percentile are:

LPU(Lovely professional University ), Amity University , Galgotias University , UPES Dehradun , Shiv Nadar University , SGITS Indore.