You can practice by running and trying to get fit, but with the ball skills just try and pretend thet there is a ball, you can also get some cones or mark out a line and zig zag around them :)
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Try aiming in a large bucket, pot, or box of some sort. Also, I'm sure your community might have a gym you can go to. Of course, there's always the option of having your brother/sister hold their arms out in a large circle while you practice ;)
You can practice dribbling in your yard, juggiling the ball on your knees and head, or just kicking the ball around with friends.