Your expected category rank will be around 1100.

According to your marks you have less chances in NITs.

You can also use below college predictor to check which colleges you can get based on your marks/rank

http://www.engineering.careers360.com/jee-main-architecture-college-predictor

NATA will released merit list after your result is declared then you have to apply for counselling. You have to fill your choices and according to your rank colleges will be allotted to you.

All the Best!!

Kindly use the college predictor app  for shortlisted colleges http://www.engineering.careers360.com/jee-main-college-predictor

http://josaa.nic.in/Result2016/result/OpeningClosingRank.aspx

IIT Kharagpur has exceptional ratings. You can pursue architecture from this college. It has good placement record.

To check the complete ratings and ranking of the college you can check below link

IIT Kharagpur Ratings and Reviews 

Architecture primarily teaches you the art of designing houses, skyscrapers, office spaces, shopping centres, malls and hotels. It is one of the unique courses as it has a combination of culture, design, and science and technology. Architecture programmes are creative in nature and it blends technology with arts. The course

No, it takes admission on the basis of NATA.

Minimum eligibility for admission to B. Arch.

(i).  10+2 or equivalent from a recognised Board/University with Mathematics as a subject of examination with at least 50% aggregate marks.                                                OR

10+3 Diploma (Any stream) recognized by Central/State Govt. with 50%  aggregate marks.

No, It accept admissions on the basis of NATA.

Minimum eligibility for admission to B. Arch.

(i).  10+2 or equivalent from a recognised Board/University with Mathematics as a subject of examination with at least 50% aggregate marks.                                                OR

10+3 Diploma (Any stream) recognized by Central/State Govt. with 50%  aggregate marks.

Can you please tell me your qualification?

You can pursue a Bachelor of Architecture (B.Arch.) program, which typically takes five years to complete.

You can apper for JEE Main paper 2 and NATA  to get admission in B.Arch.

Do you have any other doubt?