I've made my own website and I love learning about it all, if you think that it's something you will enjoy I would say go for it!
One thing I would say is that you do need quite a bit of practice to have a great website, I still want a lot of things improved on mine.
If you're ready to spend many hours of learning and think you're going to enjoy it then go ahead.
If you don't mind giving it a go and having an OK, not great website because you're not willing to spend the time then go ahead.
However if neither of these apply - listen to the other guys, get a professional - website design is a job in itself.
I often think the time I spend re-vamping my website I could have spent getting more work and paid a website designer, trouble is - I love it!