[TZubiri]

Of course there isn't a single way, here's a couple of questions that might guide your choices, alo

1- ABCDEFG or Do Re Mi Fa Sol La Si? The first is more typical in the US, the rest in Europe and RoW 2- Tabs or Sheets? Sheets are more classical, tabs are common in pop and rock.

You mentioned gypsy and flamenco style, I think those are very folklorish, so I think video would be better suited (there's just no notation for fast strumming patterns), and tablatures would be appropriate.

But to get a true connection to flamenco you need to find people that play flamenco, whether IRL or online. I don't think it's a style of music that is learned through textbooks, as you mention, perhaps not even in tabs, but I may be underestimating the art.