Definitely, you can do engineering, in spite of the fact whether you have cracked JEE or Not by one of the following routes

1. State Engineering Entrance Examinations

2. COMEDK (Karnataka Engineering Colleges)

3. Private Universities/ Entrance Examinations

VIT Vellore , MIT Manipal, SRM, KIIT, ITER, AMITY

4. WBJEE (West Bengal Public/Private Institutes)

5. BITSAT ( BITS Pilani, Goa, Hyderabad Campuses)

For more information about the list of Engineering Entrance Examinations in India, do follow the link below

https://engineering.careers360.com/exams

For career advice if jee main is not cleared do follow the link below

https://engineering.careers360.com/articles/what-do-if-jee-mains-2020-not-cleared