How to upload a file to the arduino cloud, only every week or month?

Have you tried just going to app.arduino.cc and trying it? The tutorials are very useful, but I think they will make the most sense if you use them as a reference while you are actually creating an Arduino Cloud IoT project.

Don't be afraid to try some things even if you aren't sure you understand them yet. Arduino offers a free Arduino Cloud plan, so it doesn't cost you anything to experiment.

Have you tried using an automated translator to convert the tutorials to your native language?

I use Google Translate frequently and find that it does a really good job. There are also some alternative translation services in case Google Translate isn't suitable.

I see you created a dedicated topic for that question:

I have already replied over there. We will use that topic for any further discussion about that specific topic. We can use this topic for discussion of topics specific to using Arduino Cloud.