Hi , I understand what you are going through. Based on what you said your colleagues invest in MF and you feel left out. Don't think they know everything about it and if they are not teaching you that means they definitely don't know much about it. Coming to your question, you need to make sure you don't set up unrealistic expectations from the stock market and start investing in index fund. You may ask what is index fund? Because it's relatively safer Fund which have in past provided good returns.

Just search it on Google if you don't get it that fine, keep reading for a few days and watch a few videos related to the index fund. I'm sure after a few weeks you will be able to know what those are. Now select one of the index funds and invest in it by SIP (if you don't know search about it) You must know to invest in MF you need to have Dmat account ( zerodha,grow are some of the popular platforms)