Obviously with a poor attitude, you can't succeed to your full potential. The only way you will "fill out...my adaptation and speed" is to work on it. Search around EF for some full body training programs (or ask us to make one for you).
improve nearly everyday! Most people define improvement as physically getting better with the ball. However improvement actually includes:
learning more about positioning, tactics, etc. If you havn't already torn through every single page of EF Training Learn at least one thing each day from it.
Even look at the sections that don't apply to you, (i.e. coaching, goalkeeping) as they will help you understand other people's mentality and game tactics.
Every so often, some thing *clicks* and you get a new perspective on your goal and how you play soccer. This can come from learning something new mentally, playing with better players, or a random chance.
Playing with random people, practicing with another club for fun, etc. Making new connections is a great way to improve your chances.
Aside from the usual workout, do Yoga and stretching
outside of soccer. Both are overlooked, but will help your flexibility.
At 17, I hit nearly the same realization as you. Now that I look back however,I see I could have worked just a little harder and learned more about the recruiting process. Thats the main reason I'm around EF now..so that I can help others achieve their dreams