First time I tried, this was after I saw Rebels, I watch the first episode, and it's just Yoda doing awesome Yoda things, then watched the next episode where it all focused on Plo Koon, and no real lip service to who or why Ahsoka was. And was pretty much turned off at that point. It wasn't till later that I realized that her entire introduction was in the movie.
I went back started in Chronological order, so I got some decent third season episodes, then a terrible movie, then some just more miss than hit season 1 stuff. The structure of the show is just so hard for me to get into, and I've been told it gets better, and I need to watch them for the Asajj Ventress and Ahsoka novels.