My wife is interested in getting into what she says is calligraphy, but I don’t know where to start, any of the artists here do hand lettering or calligraphy? What would you suggest as a good place to start?

She mentioned brushes, but I don’t think she is interested in Characters or sumi, I suspect she is mostly into hand lettering for decoration and such (as shown above).

I find pen sets online but she mentioned brushes. Any thoughts?