Sooo.... somehow I didn't think to post about this here, but FUNimation has put StarMyu season 1 on Youtube, so you can watch it without subscribing to FUNi
Ep 1 link:https://youtu.be/Fa_HA38xTHg
Season 2 is on Crunchy.
DOOON'T look at the recommended videos, though, because spoilers for season 2 everywhere. Like, it keeps recommending the final song from Season 2, and... obviously huge spoiler.