Practice slowly and then build up your speed. If you want to try step-dancing (and you should try it because it's fun), DO IT. Don't doubt yourself. Also, remember that step-dancing isn't just Riverdance and competitions: it's kitchen parties and regular people, too.
He's British, born to Irish parents. Like most of the lead cast of RD, both Michael Flatley and Jean Butler were Americans born to Irish parents. Not sure if there has been a lead from Ireland!
I watched a video of him and Jean Butler choreographing a project.. They're Dancers would've learned it quicker if he hadn't been so bloody rude and so bloody impatient at them. .