at least the way you phrased it
yes , there is going to be a live action Asoka series coming
but , about to begin ?, well , no
the Asoka series still has no release date yet
Andor starts next week , The Mandalorian season 3 doesn't come out till Februray ,, so I'm guessing the Asoka series won't be till after that , late Spring / Summer of next year maybe , but I'm just guessing
but , what your friend "might" be talking about , as far as about to begin , is that in October , a new 6 episode animated , Tv show call , Star Wars , Tales of the Jedi begins , it's animated , and will have 6 , stand alone episodes , each episode telling a different story , and we know at least one of those episdoes will feature Asoka , so that might have been what she meant by starting soon , or maybe she might have meant the Andor series which starts next week
now as far as the show Rebels , I've mentioned it many times on here , it's the Animated seires , I've talked about how many of the characters from that animated series are finding their way into the live action series
and one of the reasons your friend mentioned along with the Asoka series , two more characters from Rebels are about to make thier to live action
Asoka , Bo Katan , Cad Bane and the !nquisitors all started out on Rebels , and next up will be Ezra Bridger , a young Jedi and Grand Admiral Thrawn , two main character from Rebels , so your friend might have suggested watching Rebels to learn who these two next characters are , as they are both very important character , in the Star Wars universe ,
Asoka , Bo Katan , Cad Bane and the !nquisitors
Ezra Bridger and Grand Admiral Thrawn
so , as more and more characters from the animated Rebels series make thier way to live action , it's not a bad idea to watch Rebels , but I wouldn't go as far as being necessary , because you could simply google these characters , or even find a 5 minute video on youtube , that will probably explain all you really need to know
here's the 6 episode series that comes out next month Tales Of A Jedi