Gathering Info

I’m new to Linux and am just gathering some information. I would like to setup a web based database on our LAN, where authorized users could enter, retrieve and sort information through a standard web browser. I’m looking at Linux as the server OSbecause of its cost and reported reliability. I’ve tinkered with Linux a little bit, but am still a novice.
Any advice on what version of Linux I should use? Also, what other software would you suggest for the database and web server? What is a good source for training for this type of venture?
Any help and advice is appreciated.