You should start riding unhooked so your arms can be pulled in or out to keep good tension on the lines, also leaning more forward or back.
Hooking in as a beginner tends to get you pulled over on your face when you first start. Wear a helmet and elbow/knee pads.
Shin pads also help, believe it or not. When I first started with my MBS, I would ditch the board when getting pulled over it to stay on my feet and sometimes it would gash me in the shin on one of my legs...ouch.