Hi Daniel. I received your pm asking me for assistance, but I honestly believe that you need to learn to do this yourself, for yourself. There is nothing like challenging a learning curve and feeling the acheivement of having completed it yourself - especially at your age. Reading through the above, it looks like you have the time to do it too.
My own personal portfolio is my first ever attempt at making a website a few years ago - and believe me, I am old enough to be your mum ;0 - and it is antiquated by all the web standards out there (I used tables, my knowledge has advanced a bit since then) and one day I need to upgrade it to match my current knowledge, but just the fact that I managed it from the deep end, without any knowledge or help whatsoever (and there are plenty of people willing to help here... you are lucky...) and the sense of achievement that goes with it, makes me hesitant, because I am still realing with how clever I thought I was at the time, it was my 3rd attempt and on top of that, I am my own worst critic.
Link in case you want to see it, but I don't advertise it anymore and it hasn't been updated for a few years now, because I know it probably wouldn't get me anywhere and I am almost embarrassed to plug it amongst the other portfolios out there...
The suggestion of using Wordpress as a basic template as a content management system is a brilliant one. Download it to you computer, upload it to your hosting site and just play and learn. Break it, start again ;0)
xxx