at least not on my MODX

Your mother would certainly advise you to not rush into making a fool of yourself.

found it ... right ... besides the categories...

Instead describing where to find and why to choose ... it is more important to explain the sense of "Mary has a little lamb" and write down the lyrics. America first ... and only!!!
I choosed to play "Hänschen klein". Would be interesting what Japanese (Yamaha origin) choose.

This might help with basic usage:
https://www.yamahasynth.com/learn/modx/mastering-modx-article-series-music-synthesizer

But has no more importance. After I played two instruments of Yamaha (ePiano, Keyboard) I didn't listen to a friend of mine, because I was satisfied with Yamaha. But this machines cannot be levered by oneself.

Now I phoned with him. On monday I will exchange the MODX at the dealer and take a Korg. Better to have one to explain me.

bye bye and much fun

That's a relief.

I think it's reasonable feedback that tutorials strive to circle all physical buttons or touchscreen "buttons" one needs to press in order to follow the tutorial. Certainly there is some amount of "hunt and peck" expected. Mostly the information is there - but it's also true that English instructions may be followed by those without English GUIs or otherwise there may be some barriers.

There are some resources better than others and usually one finds constructive help here in the forum.

Whatever your ultimate choice of keyboards is, I hope you find inspiration and something that works for what you need.

There's also a way to get into the Category menu such that Init is not visible.

Babba's complaints are legit.