new embroideries machine profesional

[sasthia]

Hello
I just bought 2 little wonders in terms of embroiderers. Quite crazy embroidery for 6 years, I finally realize my dream to have a professional machine (and even 2 because we had a lot). Well, certainly, they are no longer outes young, but are still impecable in terms of quality of points and speed. However, the gentleman who sold us could not explain how these machines work and I confess that the mode of employment is not very clear. On youtube, I found various videos of these machines where they are seen working but no explanation on the use of the command.
Someone would know it enlighten me a little because compared to my little mono needle I feel a little lost.
These are Toyota AD860
thank you in advance