You can fmq on a Janome; I know, because I have one.
There is a bobbin case you should buy for fmq. It is made especially for this model to do fmq and will stop knots or tangles.
I'm not as good as the man who demonstrated the machine when I bought it, but if you're willing to put in time and practice, you can make beautiful things. There are also attachments to fmq (probably in the previous link that I didn't follow).