First of all, No one will assume this is scam because you are just planning a workshop. It’s a good initiative to help Bitcoin spread to your university.

I’m just concerned about the acceptance of student to your goal since India is very clear on not in favor to crypto by imposing high tax on it to discouraged user to use it. This will be very challenging for you but this is manageable.

Start to gather first your close friend to help you to start a small community. You can attract many interested user if you can showcase the benefits of Bitcoin through flyers distribution and bulletin board announcements. I once do this to promote my club on school before and we usually offer something to user that they can’t resist to come with us. Think of things that people in university like the most and use it as medium to lure them.