Sky Shadow is correct, She-Ra ran for a pretty decent length given the larger than average amount of episodes in the 1st season and the toy line was fairly successful. There are a good amount of POP toys in the after market signifying that they sold reasonably well back in the day.
Not really. He-Man had a strong female cast. They weren't archetyped into the typical 'damsel in distress' role and treated no different to the male cast while still maintaining their femininity - Teela, The Sorceress and Evil-Lyn were all 'core' characters and in a position of power. This is probably what attracted girls to watch the cartoon as those female leads were pretty prominent.
When it came to She-Ra, the same formula was used and the cartoon was very successful with both girls and boys despite the cast leaning more to female characters. Aside from still having a lot of action/adventure elements it also had much better written episodes than He-Man which IMO stand up better to the test of time and more watchable for an adult.
I have almost finished watching the first season of She-Ra, It's massive with over 60 episodes. There is a good amount of '80s' goofiness but a lot of the stories are entertaining and smartly written enough to hold appeal. It is also no where near as repetitive as He-Man with much better animation.