Hi Jerome Olivier,
I have done way back in time an introduction series. ( With a rusty English at that time, which has hopefully changed since ;o)
What has not been changed, is the “inner mechanic” of XPresso. (XP in capitals, not a typo)
There are two main parts which are, more or less, mandatory to be understood. The first one is the “format” that runs through the “wires”. If this is not clear, ask in the forum (Cineversity Q&A).
The second part is of course the Nodes. It is NOT mandatory to know them all from the start, to get working.
Besides that, a good idea about logic and mathematic should be available, to have really fun with this option.
There is no big secret or something that can’t be learned. In fact, after a little while it will be pure fun, as it might accelerate or even improve your options.
For any question, please use the forum mentioned above. I hope I will be able to answer “anything” about the details, so you get up to speed very quickly.
All the best
Sassi
P.S.: There is always an option to use the 1on1 learning option, which is intensive and you have an instructor all for your self. There is no faster way of learning XPresso.