I started watching this show after I finished the vampire diaries and then originals. That is what I personally recommend doing is watching the vampire diaries, the originals, and then legacies. It will make everything make so much more sense and an overall better experience. I am in love with the world Julie Plec has created with these three shows. This show is interesting and I find it very entertaining. I definitely recommend watching this but after you have watched the vampire diaries and the originals.