With 36 percentile in Gujarat Board and 66 percentile in JEE Mains, getting a seat in a government college for Computer Engineering will be difficult because government colleges usually need higher scores. You might not get top government colleges, but you can try for some state-level colleges or private colleges with lower cutoffs. Also, check if there are any special quotas or management seats available. Keep backup options open in other branches or colleges to increase your chances of admission.