Yes.
You go to My Mibba. Go down until you see a section called Profile. Then click on CSS.
On CSS, you can either on the last link under the box that says "Click here to use on of our pre-made layouts." or have someone make you one.
Then, choose a layout, click install, and your profile is changed.
Hey! Welcome to Mibba!
I'm sydney. syds for short. :)
I'm new too, so if you want to talk we can. :)
Oh, and if you would like to read my story or poem and let me know what you think it would be amazing. :)
let me know if you write anything and I would love to read it!