Yes, there's only one, that's real beginner guide. All of the don't hold candle
to it.
I learned all manga drawing by this channel. After doing all his lessons regularly, I became capable to learn from Manga drawing textbooks and learn from tutorials video.
For last 5 or six years I couldn't learned a bit after downloading books and following others tutorial, correct way to teach was missing. This channel I found last year, and I got Kickstart.
He is new youtuber, he only uploads a single tutorial per month, so it has currently 32 tutorial videos. But they're awesome.
I watched his all videos 5-6 times practice and learn. Learning is long and arduous process and there is huge need of revision and repeat. To work steadily is most demanding necessity.