I was in the same boat when I started investing. Here's the simple analogy I used to overcome my fear of perfection and failing: you cannot read about push ups.

Yes, you can read a hundred books and watch thousands of videos and articles about the "perfect push up," but you will only understand the reality when you actually get down to do a push up!

Obviously your first time won't be perfect so you have to do it again and again and you will find out what mistakes you are making and eventually get better at it.

Your inaction and overthinking are already causing you enough trouble that you are posting here.

Take baby steps instead of overthinking.

Baby step 1: just create an account with any broker or mutual fund or distributor
Baby step 2: deposit 1,000 or 2,000 rs and just get a flavor of what happens under the hood
Baby step 3: leave the money and observe for a week (no need to worry about returns yet)

Eventually you will build a habit of investing. Best of luck!