The last 2 Boba Fett episodes are pretty much episodes of The Mandalorian. The central plot of the Boba Fett show is itself spun off an episode of The Mandalorian. I think it would be good to watch the The Mandalorian first.
I believe all the new Star Wars shows are building towards a combined finale, Marvel Defenders style. Seems like their plots will not only cross-over, but actually weave into each other quite a bit