There isn’t any “official” tutorial series out there, yet (like the Legacy plugins have). Searching Youtube will get you hits here and there, but getting up to speed is harder that way - I started like that, and it took me a lot more time than it should’ve…
Although the components are a bit different, I don’t think that watching “older” videos would be a waste of time - a lot of tips and tricks and general issues are discussed that span way beyond what to plug into what. Also, the legacy plugins have more features for now (I’m not sure how the Therm and Window integration would be implemented anytime soon into LBT 1.x, for instance).
I recommend the Performance Network series, which is a really structured approach to get going. Also, if you support Ladybug Tools on Patreon, you get access to the “official” videos, but I find it would be better to start with the other one, although the latter is cheaper - if budget is tight for this.
This one is really comprehensive:
These are also good, but I found them a bit harder to follow (audio quality is just horrible on a few videos) - read further how to get acces to the Vimeo group with the videos:
Thinkparametric also has some videos to give you some idea:
These are the ones I’ve watched, plus countless Youtube videos - but often they show some weird specific workflow. Look for Chris’s or Mostapha’s channel.
If you desperately want to start with LBT 1.x, watch this:
TL;DR:
Yes, there are differences in workflow, and LBT 1.x is more abstract in a sense, but you won’t miss anything by learning the basics “the old way”. 
In my opinion, of course, I could be wrong.