You know I thought that same thing I was 4 when I started baseball and I would do good or I would do bad, well I got to a point I was the worst player when I would Strikeout everytime and I would get made fun of and one time I struck out and said fuck it I am never gonna stikeout agian ( I was about 10-11) And from there on I practice my ass off everyday and lifted and ran and did nothing but eat, sleep, breath baseball and the next year came I was hitting HRs, had the highest batting avg. and I made the all star b team so i got pissed again and the next season I would practice do the same thing and when I came back I was the biggest in the leauge I could hit the farthest I could almost be the fastest, and I made the allstar A team and won state. Long story short, and I use this saying all the time and I am only 14. "You can do anything you set your mind too." Practice makes perfect if you goof off in practice you will do the same in the game. And trust me even if you are bad at sports just go lift the secret to alot of things helps with confidence helps with your heatlh and everthing but my advice which I am starting to do is RUN RUN RUN cardio is the best thing to have in any sport espically soccer.