It's important for every project to have a champion, someone who can keep the team focused, to push toward your agreed goals.
Your contact database needs a champion too.
It means that at least one person can learn some database basics, making sure information is being entered consistently, implementing the agreed routines, detecting duplicates, and tracking who is putting in what.
There'll always be someone who wants more bells and whistles, others who want fewer features, and others again, who question why this person or that isn't on the list. Putting one person in charge helps you stay consistent and keeps the information you are recording relevant and reliable!