Great to hear that you are exited about Blue Ocean and want to contribute!
We are using the issues.jenkins-ci.org "blueocean-plugin" component to track the work. If you are interested on a ticket please comment to express your interest and I'll make sure that one of our developers can get you up and running.
I need to publish a more formal roadmap but Jenkins.io/projects/blueocean is a good description for what we want to do for the 1.0.
Is there anything in particular you would like to work on?
Cheers
James