For someone who isn't a designer, it's pretty nice.
Here is something I COMMAND you to do... Take the music off the page. Music on webpages are a HUGE HUGE HUGE NO!...
I would say maybe make it less boxy but as you aren't a designer, you might not have the biggest enthusiasm for new ideas, so... maybe try and make the text more easy to read and make the content more texty and less images to make the layout look more informative... although, as it is a portfolio, this isn't a huge concern... in my honest opinion, if you aren't a designer like you say, I think you have done a great job.
Well done