How to Start Helping with UX, Coding, Art and/or Sound?

Hello guys, I am still a beginner with Trisquel and GNU really and I love the fact that as individuals we are coming together and making something ultimately awesome. I would like to know where do I go to help out with the Trisquel distro?

I have varying degrees of skill in the things I listed in the heading. I was wondering if there is a way to kind of go to a task board and kind of take ownership of a task and then submit it. Is that how it works? If it doesn't please let me know how. I think I'm ready to start helping in this creative way I am suggesting.

I know there will be lots to learn.

Thanks!

/david