I think Sue has a point.
It used to be that one would get a broad ‘certification’ for group exercise, and then take CEC training in various areas. But as the fitness industry grows it is not lost to people that one can make a lot more money by trademarking a style and offering a certification, and thus we find ourselves awash in them.
I know nothing about gofigure: it may be really rigorous. I make a general point that there are a lot of them and the quality varies a lot.
If you are interested in teaching Barre go for it, but a nationally recognized major certification is definitely a good thing to have to anchor any of the other trainings you choose to take. And then choose whatever specialties work for you that also have weight in the markets in which you wish to work.