Learning how to invest?

Hi, I'm a sophomore in University. I'm working remotely this summer, so I have some time on my hands, and I want to learn to invest. 

Can anyone give advice on to how to approach doing so/have any resources? I'm relatively new to the game, wondering if I should read books (intelligent investor, poor charlie's almanac) or read sell-side research, etc. 

Any help would be greatly appreciated!