Neat. I don't do streaming but the Blu-Ray of Sailor Moon R: The Movie is pretty cheap on Amazon right now. I'm also seeing a lot of suggestions on that site for Sailor Moon S. What do the letters mean?
They denote the season, the original anime had five:
Bishoujo Senshi Sailor Moon
Bishoujo Senshi Sailor Moon R
Bishoujo Senshi Sailor Moon S
Bishoujo Senshi Sailor Moon SuperS
Bishoujo Senshi Sailor Moon Sailor Stars
Or classic, R, S, SuperS and Sailor Stars for short. R, S and SuperS each had a movie.
For future reference, the five corresponding manga arcs are Dark Kingdom, Black Moon, Infinity, Dream and Stars but they are very different, while SuperS is a weak season many fans think the Dream arc is one of the atro gest.
Sailor Moon S the movie is ok, I prefer R though. If the suggestions are for the S season it is often seen as the best and most popular one and it is good but should you decide to start watching the series I recommend the first season because it's nit a show that needed time to