I'm even worse off than that. I watched all the Tales of the Jedi, but otherwise haven't seen more than a few minutes of any of the animated stuff. At first because I already had more stuff to watch than I had time for, and eventually there just became so much of it that even starting into it seemed daunting. That list helps narrow things down a lot, but I'm still not sure if I'll do it.
What Filoni and company did really well with The Mandalorian and Boba Fett is not require knowledge of anything beyond what we've seen so far in the given series, but anything else that fans recognize from other series, movies, etc. is a nice bonus. I'm thinking I'll just go that route with Ahsoka. I'm sure it'll be good, and I'm trusting them to put together a story that holds water without me having to know the backstory of every guest character.