I have seen the project structure on readMe, how can I take this structure of my project, any program? any website. doesn't seems right to me to create by hand?
Yes, there is a very simple way to get it.
Navigate to the root folder of your project and run tree
from your terminal. You should get something like this:
project_root
│ README.md
│
└───some_folder
│ │ another_file.txt
│ │ some_code.code
│ │
│ └───some_subfolder
│ │ some_more_code.txt
│ │ another_file.txt
│ │ a_picture.png
│ │ ...
│
└───another_folder
│ more_files.txt
│ more_code.code
...
Now you can copy and paste this tree into your README file, wrapping it in triple backticks - ``` to get the markdown styling.