Categories and multiple subcategories

[Lamine_Camara]

Hello,
I am a new user of Glide, I would like to achieve something in my app, and can’t figure out the best way to do this.
I want to be able for a user to complete information for 4 categories.
For each category, add as much domain as he/she wishes and a corresponding level (1,2,3) of mastery of that domain. Visually, in a word document, it will look like this:

Thanks for your help

[ThinhDinh]

I think you can have a table to do this, with the structure as below.

User ID	Category	Domain	Level
ID1	Langage/BDD	Python	2
ID1	Langage/BDD	MySQL	3
ID2	Méthodologies	Agile-SAFE	2

Then display that in an inline list, grouped by the category.