OK....don't worry about cadence yet. Just get used to the bike and riding first. Make sure to take water with you and just go as far as your body tells you is comfortable (remembering if its an "out and back", that you need to turn around at your halfway point).

It isn't that complicated....I know, I get caught up in the "techno-gizmos" too, but try to get away from that and just ride (I still have to work on that issue a lot too).