Do I have a chance to be at least a sponsored am skater?

No offense but if thats all you can do then probably no. i no a fourteen year old who can do at least 10 more different tricks including those and most people don't know his name in the town he lives in. But hang in there u must realize that amateur is the level right before pro and many pros had to start at amateur and work their way up you might also want to try to get sponsered by local shops. GOOD LUCK MAN!!!!!!