Learning to invest as a teenager in college

I want to do some stock investments Im 18 right now and I dont really have a regular income but im very interested in stockmarket and how things work , i would like to invest in SIP MF i dont really know everything yet, my capital isnt that huge either , its basically experimental for the future to learn from this. it would be really helpful if you guys can suggest me where to and how to invest , i unfortunately dont have a person to guide me in this. it would also be helpful if you guys could suggest what to learn and where to focus , i know some basics like reading charts and stock distribution etc but im not really informed about how the thing actually works . PS . please do suggest books that helped you guys thankyou guysss .