Those look good for first rosettes. It looks like you've got the inlaying into the top part of it pretty well down. One thing that could use improvement for this style of rosette is to figure out a way to cut your tiles so that the radial edges are actually radial. Several of the spokes in each rosette don't line up with the center hole and it doesn't look like that was intentional.

It was not and you’re correct. I cut the pieces on a bandsaw after making a 30° jig. It became apparent as I dry fit them that it was off. Tried to fix on disc sander but clearly not perfect. Next time!