Not sure that is a simple question to answer as there would be a fair amount of work to do. It doesn't sound like a complicated Dbase, but there are still quite a number of tasks to perform. Have you looked at the sample databases in Access to see if there are any that might lend themselves to what you neeed?
Is it just contact information? If so there is an inbuilt one in Access you might be able to use. It could also be possible to copy/paste your existing data into the tables to avoid long winded re-entry of all those people.