I like to quilt when alone because my family is distracting. I also like music on when I FMQ. Definitely remember to breathe..LOL. Wind several bobbins before you start and remember to check periodically that you haven't quilted sections without thread! Try to relax. Some say wine helps, but I don't drink wine, so I can't confirm that one. Practice alot! Laugh at your mistakes. Don't be afraid to try various designs. You may find you are better at one over another and you can build your confidence quicker sticking with what you are good at for awhile. Personally, I am not a good stippler! But I've done some practice feathers that don't look so bad.
Bottom line...just do it!