Scared to try out for soccer, motivation?

Coaches don't care how much you can juggle it will be purely based on your skill on the ball. They can give you fitness and most clubs have "open practices" for 2 months before the actual tryouts so hopefully you will be in shape by then. There are also many levels of select soccer. So you will probably want to go to several teams open practices and you can get a good idea of your skill level compared to those your practicing with. Be confident in yourself and skill with the ball and you will be fine just stay within your skill level.