Hey all - I just got a new Specialized bike and was wondering - is it possible to overtighten a quick release on a bike? If so, what is the proper way to attach and detach the wheel? It's a little hard for me to understand.

A second question, if I may ask, I also bought a bike pump - a floor pump - and it has one of those little psi dials on it. If I put it onto the tire, it says "0 psi" but that can't be right - it's inflated! When i start pumping, it goes up to 10, then 20, etc. Do I need a tire pressure gauge to accurately tell or am I doing something wrong? I'm using the road bike-style valve - the Presta (i think?)

Thanks for reading.