sphere looks good from here.
Spheres are great fun to do and can be an end to themselves or an element of a piece.
Soren Berger, your countryman, does a lot with spheres.
I use a cup In the headstock and a flat pin 1/2” diameter on tailstock, simple to make.
Marks from the cup disappear with the 320 grit paper.
Skills mastered in turning a known curve make the curves on bowls and hollow-forms better.
holding spheres on the lathe with pressure alone increases confidence and
when I was asked to do demos for the Smithsonian museum show of furniture, I chose to do spheres as several pieces in the show had spherical elements.
you might be interested in this thread of a Ball in a ball.
https://www.aawforum.org/community/index.php?threads/ball-in-a-ball.15698/
Includes video of a demo from 2010 at the AAW. There may be some things you might want to incorporate in your style. And you might want to try the ball in the ball.