Unfortunately, Fusion does not yet support text along a path. That enhancement is on the list, but has not yet been implemented.
For embossing of text, there are a couple of options depending on the geometry in question. Simple Extrude works for planar geometry. For more complex geometry, Split Faces and Press/Pull can do a pretty good job of embossing. But, as of yet, Fusion also does not have a true Emboss feature - also on the enhancement list.
Jeff Strater (Fusion development)