Hello Everyone

Im new to android development and I was just wondering if someone could point me in the right direction.
I want to make an android app that puts say a collection of football grounds on a map of my city. I want it so anyone on the team can upload a new location using their android phone (who has the application of course).

Just wondering what's involved in the updating/retrieving of the information (coordinates and preferable some info about the ground). Does Google Maps provide a way to store coordinates without the use of a database? Would a database be the way to go if I want some additional information as well as the coordinates? (warning very silly question) Do I then keep this database on a webserver and update/retrieve info as I need?

Thank you. Any help is very much appreciated