I am hoping to join Sir JJ college of arts can i get a seat there 

Hello aspirant,
Sir JJ college Of Architecture is one of the most sought after colleges not only in Maharashtra but across the country.

Unfortunately, the number of seats for a general candidate are very less. if you are a male candidate its even worse.
The admission process is through the DTE website and the only other college that competes in this process is Rachna Sansad AOA.
So, for any hopes in admission as a general candidate you need to have a rank under 30 hoping that a lot of people before you chose Rachna Sansad.

To achieve that Rank you need to obtain an aggregate of 150+ which is calculated by considering 50%of your NATA score + board percentile.
If you have any questions please let me know
All the best!
Thank you!!!!