After completing 10th, you can join diploma engineering courses. After that, you can get direct entry in 2nd year (lateral entry) in B.Tech course.
For regular B.Tech courses, you have to complete 10+2 or equivalent with Physics, Mathematics, and English as compulsory subjects along with with Chemistry or Biotechnology or Biology or any technical vocational subjects as optional with a minimum of 50% marks (different for various entrance exams).
You have to appear for entrance exams like Jee main or any other state level entrance exams.
There are many b.tech courses available to you- computer science engg., electronics engg., electrical, civil, mechanical, manufacturing engg., chemical engg., production engg., aeronautics engg., environmental engg, electrical and electronics engg., ceramic technology, automobile engg, construction engg, biomedical engg. Etc. Choose as per your interest.