Dashcode

Hi,
I'm trying to create a web app where you can sign in and edit profiles but I don't even know where to start on this. How is the best way to go about doing this?

The point of the app is to link to player profiles so that at college showcases the coaches can look up the players, so I was hoping to make it so that you could search on the first page and then on the details page it would come up with the profile. As of right now I have it set that it searches on the website when you search a player's name. This works but it isn't really what I wanted to do. What is the best way to take the profile from the website and put it into a profile that I designed on the web app? Does that even make sense?
Thanks!