I've been watching since 2013. It's a fantastic product.
Their standard format (outside of the G1) is to run tours. You'll get two weeks worth of relatively inconsequential house shows (between 1-3 will air on NJPW World, generally the one from Korakuen Hall) and then they'll finish it with a PPV (NJPW World www.njpwworld.com ).
If you're watching other products, or don't have the time - you can easily get by with just the PPVs. NJPW World has a schedule of everything that will air for the month so it's easy to keep track and websites like purolove.com and puroresuspirit.com are helpful to keep track of what's on each show.
I'm in the right time zone and primarily watch NJPW so I'll watch most of the house shows that air.
It is a better in-ring product than most worldwide but what is often forgotten are the characters and stories. Stories are a lot simpler and you don't really need translation to figure out what's going on (though some Twitter accounts do translate the important stuff as it happens).
I'd recommend starting with the G1 final (August 14) if you don't want to invest a lot of time into it and then just watching the big shows for a while to see how you go with it.
r/squaredcircle live event threads generally have streaming links, but NJPW World is a great and relatively cheap service. Doesn't hurt to try it out to see if you like it first.
To familiarise yourself with the product I highly recommend Voices of Wrestling's 2015 NJPW Year in Review ebook. https://payhip.com/b/Y7Ru
Do you have the ESPN channel?
I use watchespn to watch Rugby they stream it live as the match happens and you can watch it on demand for i think up to 30 days afterwards after you sign in with your Cable provider however your Cable provider must be on the affiliated list.
Works like a charm over here on the east coast of USA and it's no extra cost as it comes with your channel it's sweet!.
Do you have RES? Cause if you do these weekly posts should have timestamps you can click to take you to the videos and where the matches start. Those 3 videos being Monday in Puebla, Tuesday in arena Mexico and their flagship Super Viernes(friday) show. The first two stream live on youtube, while Friday streams via Clarosports.com. All 3 are achieved right after on their youtube.
Some folks have asked me about jousting... this isn't my troupe, but I know some of these blokes! Australia Just Hosted The Inaugural World Jousting Championship
It's personal preference in some cases. I felt the Cena vs AJ Summerslam match was better, imo Cena/AJ III didn't add enough upon their first 2 bouts, 3 if you count Enzo/cass/Cena vs Club/AJ.
With hindsight I'd probably rate their Summerslam match higher than the Rumble bout. I wish there was a wrestling version of Letterboxd.com