I've been practicing my Gallifreyan. It's quite fun. But there are some aspects of the not-quite language - it's really more of a code - that make it difficult. For example, a lot of the "rules" are purely aesthetic. How the dots look on the letters, or how long the lines are, can vary depending on mood or your particular style of drawing. It might, however, allow for the Time Lord version of "handwriting" I guess. I also find that the hard part of making sentences (and paragraphs, etc.) is the spacing of the letters. Some groups of words just seem naturally suited to each other. Others are less so. One strategy I've been using is to make the words separately to get an idea of what they look like. Then (because the size of the words can change to make them fit together) I will sketch the rough shapes out to try to get them all to work together.
I also attempted to cut out the shapes, but since you can't really change their shape or slightly move the letters around to make them fit together, it wasn't very helpful.
I have also tried using the computer (PowerPoint, if you must know, as my Photoshop skills are nil) to make the shapes. They are much cleaner, but lack the rough, artistic look of the hand-drawn characters. This one says "Gary." I hope :)
So here are my first to basic attempts at writing full sentences in Gallifreyan. This says "Give me liberty or give me death" (more or less).
And this one says "If you wish to make an apple pie from scratch, you must first, invent the universe." Also more or less.
I highly recommend learning it. The alphabet/code is an easy learn and there are lots of resources online (http://timeturners.wikidot.com/circular-gallifreyan). And it looks cool. At very least, all you Whovians should figure out how to write your name!