Hi Usman,

After clearing the JEE Main Paper 2, you may either take admission in B-Arch courses offered by various NITs, IIITs, GFTIs or Top Private Colleges across India or you can appear in the further exams and apply for IIT Admissions.

Well, after JEE Main Paper 2, the next step is to appear for JEE Advanced Paper 2 and then if you qualify this exam too, you can go for the next and final exam - JEE AAT.

If you get a good rank in JEE Main paper II you can take admission in NITs. 

If you want to take admission in IITs then you have to appear for JEE Main paper 1 then you have to qualify JEE Advanced exam to appear for AAT exam for architecture. 

Good Luck!!