hi,

see as per your score you are eligible to apply in all institute, you have the qualifying marks criteria, however bits admission process is basis on score in bitsat exam, however you are not eligible to give bit sat, since you have passed 12th in 2018. now coming to iiits iiest shivpur, admission is basis on jee main score, which you are eligible to apply, since jee main exam can be attempted 3 times starting from the year of passing of 12th course . iisc does not offer engineering courses it has bs-ms dual degree course which is done on the basis of jee advance exam or jee main score , same goes for iist, since admission is done on basis of jee advance score,  you are not also eligible to apply for jee advance exam this year.