Hello, I am a real beginner and I have made a PCB. I have watched many tutos,
but very often tutos are running too fast and I miss final process. I would like to know chronologically what I have to do.
Which files to upload etc ....
Thank you and salutations.
Bernard
The process for ordering a PCB or a PCB Assembly (PCBA) is described here:
https://docs.easyeda.com/en/PCB/Order-PCB/index.html#Order-PCB
Maybe read through that a couple of times and then try the video tutorials again.
Probaby before you do any of that, it will help you to read and action the essential checklists, (4) and (6) in Welcome to EasyEDA, (2) in:
@f6ggi Hello
If you find it a bit unclear on how to properly establish a
panel then maybe you want to take a look at the offered JLCPCB Panel option, by
selecting "Panel by JLCPCB" our engineers will create a panel from
your design, so all what you need to prepare is a design of one single board,
upload it to the ordering page and indicate that you are willing to produce a
panel by specifying the panel pieces amount (rows and columns).
More details here: https://jlcpcb.com/quote/pcbOrderFaq/Panel%20by%20JLCPCB
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
What version of EasyEDA are you using?