You are very much welcome to steemit @xpunek, You have all it takes to earn money here to buy your dream computer and some money to support you while schooling once you post quality contents . You can also participate in contests. Visit the #newbieresteemday and #greetersguild for information on navigating your way around.
thanks
You are welcome.
how i can participate in competitions
Visit the contest tag just on the left hand side of your steemit dashboard. Here is a screenshot for help http://prntscr.com/iqa4n1