Newbie got some questions about online business.

Hello guys im new on this forum , my name is Kemal and im from Austria ( Middle Europe ). My English may not fill the bills but i will try my best. So im studying in Austria ( congenital im from Bulgaria ) and found that what im doing right now is not really my passion. So i tought what would i like do to ? Before 2 weeks i just realized that making money on internet could be a good opportunity for me. Before 2 years when i was still living in Bulgaria tried to start with promoting ClickBank products on my own website but i gave up after 2months getting really dissapointed. So i tought i was done with that but now i have motivated myself again. My idea right now is buying stuff from wholesalers and sell them on eBay , amazon or even my personal online shop , dropshipping is also on my mind. I think i found a good supplier for sport goods such as footwear , accessories etc. But as the supplier provides only branded stuff ( Nike , Adidas , Asic etc. ) i have some questions. Do i have the right to sell these stuff on my own or i need to get access from the companies that own the rights of these products ? I also would like to know the chances i have to import from non EU countries such as USA , China etc. Are those more worthy to import from than EU ? Its really messed up in my head right now. On other side are my parents who expect me to be studying hard and i feel bad becouse all the money they spend on me and im doing nothing ( failing exams etc.) So i need advices that would make my life change as fast as possible. I really belive that i can build wealth with that but i need someone to save me from this spiral going down every day. Any advice will be highly appreciated and respected. Have a nice day !