Based on the JEE Main 2024 cutoff data for IIEST Shibpur, securing a B.Tech CSE seat with a CRL rank of 500129, even with the West Bengal home state quota, appears to be highly improbable .

Looking at the previous year's closing ranks for the general category under the home state quota, the cutoff for B.Tech CSE at IIEST Shibpur was significantly lower than your rank. For example, in the final rounds of JoSAA counselling in 2024, the closing rank for general home state candidates for CSE was around 17609 . While cutoffs can vary slightly each year, a difference of this magnitude makes admission very difficult.

While having the home state quota provides some advantage by reserving 50% of the seats for candidates from West Bengal, the competition for popular branches like CSE at a prestigious institute like IIEST Shibpur remains very high. The number of CSE seats is limited, and many candidates with much better ranks would also be vying for them under the home state quota.

Therefore, it is advisable to be realistic about your chances for B.Tech CSE at IIEST Shibpur with your current rank. You should definitely explore other engineering colleges that might be a better fit for your rank, considering both state government and private institutions in West Bengal and other states. Participating actively in the JoSAA and CSAB counselling processes and keeping an open mind about other branches could lead you to a good engineering college.