Python, C, Java or JavaScript depending on your goal — not a single internet answer.
Read this alongside the Best Programming Language for Beginners teaching at Krishna Institute of Computer Technology. The related course page carries duration, mode and curriculum.
If you are in Ahmedabad, combine this guide with a visit to the Ghatlodiya centre so a counsellor can map the next 8–16 weeks to your background.
Related reading sits in the same cluster: course page, category hub, and the Ahmedabad training page when the intent is local.