Hello,
Don't worry about learning about hand skills until you are in the dental school. To get your hands coordinated for dentistry is a systemic approach and you will be taught this. You will be taught to think in millimeter. ie. THINK SMALL! A way to help you get ahead is to work with reverse image (like looking at the dental mirror) by using a piece mirror and try to write/draw an image/sentence by only looking at the mirror. I found that this practice is really helpful. If you are a plastic modeler ( I started when I was 5), it really helps alot too. DP