I have an Excel worbook containing worksheets of all our baseball
participants from last year. I would like to use it to facilitate our
registration this year.

Here's my idea.

I would like to setup several laptops with access to a hub and server. I
would like to be able to register players for the season by first searching
for a current record for the player. If one is found, I would like to open a
form containing the registration information and confirm or change and save
the updated information.

If one is not found, i would like to open a registration form that can be
completed and saved and save as a record on a specific worksheet based on the
age of the player.

2 questions:

Is it possible?

and

How difficult is it to setup?