I need advice. CMS like PHP script. Newbie

I am a newbie to CMS stuff, installed postnuke several days ago, but after hours of different configs... No luck... I have been doing all our web stuff using html with some small php scripts to do the job. Our roster of artists is growing (but not budget for designing site ) I want to redo our main artists page ( http://carmelme.com/booking.html ) to automaticly list a new artist the moment I add an an artist page (kind of like news stories in two columns) and then every artist's page would be a template (kind of work like a news story post) on top would be a picture middle a couple of paragpraphs and in the bottom list of audio files (it would be nice if I could just enter them as "uploads:) and they would be put in a table and at the end would be contact info. Example of what I imagine (and have already done in HTML staticly) http://carmelme.com/bumpus/ or http://carmelme.com/afrodisiacs/. I would have main menu to left and on top keep something like a top navigation bar (hopefully auto generated) as in http://carmelme.com/booking.html Any suggestions? What blocks should I use. Hardest part is listing those audio file listing in a table. Can't wait to hear some suggestions. I really want to save some hard labor I put in doing HTML and spend it more on working with more artists...