The below post may help u in starting and understanding businesses:
Start reading books with One upon Wall Street by Peter Lynch and The Thoughtful Investor By Basant Maheswari.
Just Google Value Picker u will get loads of info, spend time reading, digesting the info and understanding. Slowly evolve a style of investing suitable to u and built portfolio.
Best part is u r starting early so u can afford to do as many mistakes as possible and learn.
