As a college student, how do I invest in the Indian stock market for the first time?

Do your own preparation before going for any paid trading workshops

What I suggest is first you read few good books like

Trading markets by Ashwani Gujral : This will give you a kick start

then watch few videos on Youtube, just search for basics, you get great videos and in different languages

then attend few great seminars and if possible get a mentor, it will even do if you share experiences on a social medium

for Fundamentals read The Intelligent Investor by Benjamin Graham and few books on reading annuals statements

you are done, open a D-Mat trading account

There are 2 places where you can invest your money; Capital Market (Stock Market, Currency, Commodity, debt instrument, bonds), Money Market (bank deposits, mortgages etc..)

Now, each investment vehicle has its own risk and reward; in brief, Capital market is long term (more than a year) and money market is short term (a year or less).

but before proceeding understand what you exactly want and what you want to do, this may be the toughest part, if done properly rest is easy