There are many ways to do this and I’ll try to make this as simple as possible for you and your friend.
First, just like @gggritso said, Posterous is probably the best option for your friend. He doesn’t even need to sign up! He just needs to email his work to post@posterous.com but I do recommend he sign up sooner or later if he is really good.
But if you do want something a big more advanced, Tumblr is a great for blogging. If you do want to sign up and create a beautiful blog on Tumblr follow these steps.
1. Sign up at Tumblr it’s very simple. You enter your e-mail and you desired password. Then you should get an email from Tumblr trying to verify if this e-mail is indeed yours. Very simple.
2. Once your account is set up, you can go to what Tumblr calls the Theme Garden. This is were all the different styles and layouts are. I’ve found a nice photography style layout that you might like. (Here and another here)
3. Once you’ve click on the links I gave you, just click on ”Install theme” and it should be installed on your blog!
Also before you install a theme you have to option to see how it would look like by clicking “Preview”.
I hope I helped and if there are any other problems tell me and I’ll find another way to fix it.