For Juliet tilsed (is there a quote feature on this forum?)

You can pretty much start at any series you want as they're all self-contained. If you want some reccs, my personal favorites are Ryuki, Build, Fourze, Gaim, Agito, Saber, and Gavv.

You could also jump in at Zeztz when it starts next month.

As for WHERE to watch it... Well, there is no real legal way to watch it in the west, but you can find torrents on the cat site and there are several streaming sites to watch it on like tokufun and tokuzilla (though, mind the ads.)