If you want some rustic SubD modeling that be possible directly inside Moi! ;)
https://moi3d.com/forum/index.php?webtag=MOI&msg=9689.1

If you want a true SubD prog with the same interface than MOI !!! And direct Import / Export between the 2 applications (<-->) and with a shortest learning curve than Blender!!!
free Rocket3F https://www.rocket3f.com