Hello,

To join ISRO you firs need to do either of the following degree

• B.E

• B.Tech

• B.Sc. (Engineering)

• Diploma + B.E/B.Tech(Lateral Entry)

• B.Sc. + B.E/B.Tech(Lateral Entry)

• AMIE

• B.E/B.Tech degree part time

Unless you have one of the above degree you cannot join isro. As you have to join a good college after getting good rank in JEE Advanced. Please click the below link to know more.

https://engineering.careers360.com/articles/isro-recruitment