Oh another general tip I thought of, everyone make sure to stop by a police station at some point and search for a flak jacket. So to recap, the three general tips I've thrown out so far that apply to everyone:
When you get your first skill, pick Freerunning (unless of course you are a Scout and thus started with Freerunning.)
Carry around at least one FAK at all times, so that when a zombie infects you, you can heal yourself.
Find a flak jacket. You only have to do that once and then the flak jacket lasts forever, reducing the amount of damage you take. Personally I would say don't spend the AP on this until you've gained a couple levels first, because police stations are frequently barricaded too high for newbies to enter, and then you just wasted AP you could have spent gathering XP.