Help me out please

I have a web site I need to do, so I need help on finalizig it.

It’s about this sports club, and the members want to be able to put in their personal stats by themselves, not by me.

So, the page needs the members part, which I never done before, and also, it needs a somekind of stat tracking.

Ie., everytime a member puts in his digits, on the first page the overall sum increases of course.

Also, maybe something like average per day sums and similar…

So, what’s the best way to make this? Any help appreciated…