Arrow and The Flash Viewing Order

After leaving season 1 of Arrow half way through at the start of 2013, I am finally getting back into it. I'm soaring through season 2 right now,,, HOWEVER I am not oblivious to the fact that The Flash is a crossover show as the CW and DC Comics and blah blah blah you know it. So I found a viewing order in another blog that also introduces the mini web series Vixen in between seasons.

http://geekritique.net/2015/05/19/arrow-and-the-flash-chronological-order/

However, IMDB has one according to CW Universe/Arrowverse (according to the Multiverse of Commics) includes Legends of Tomorrow and Constantine

http://www.imdb.com/list/ls074499769/

If you're a comic book (turned into screen) rookie like me but you want to know more, especcially about the multiverse without having to rip open 50 tabs of wikipedia to understand why all these earths and whatnot exist, youtubers are a pretty good way to go. I found this when I was questioning google 'multiverse for dummies' (I didn't really google that- well I tried but I came up with nothing)

Multiverse Explained - Marvel and DC

I love the TV shows and Movies that Marvel AND DC come out with but they're always coming out with different films and rebooting others and it's hard to keep track of... I mean spiderman reboot #3? but it comes under a different section of the franchise? um? someone plz explain..

Anyway I'm gonna keep at it and finish binge watching the arrowverse and sell my soul to the comic book lords.

Adios, I will eveNtually sign in more...
Inshalla