docs: update README.EN.md

README.EN.md

@@ -6,8 +6,33 @@
 
 _🇮🇹 [Italian version](README.md)_
 
-**Template description**
+## Description
+
+This repository contains the UI Kit for the website and services model for Italian municipalities.
+
+The kit includes the following resources:
+
+- the **layouts** of the main pages of the site (`comuni-modello-sito-e-servizi`);
+- examples of **service flows** (`comuni-modello-sito-e-servizi`).
+- the **component library** (`comuni-libreria-componenti`);
+
+These files, available for both Figma and Sketch, will provide you with a clear picture of what a website should look like and how it should work, helping you maintain visual and functional consistency with the standards of the Italian municipalities' website model.
+
+Warning: some features present in Figma files (.fig) may not be present and/or correct in .sketch files converted using the most recent version of [fig2sketch](https://github.com/sketch-hq/fig2sketch). It is therefore recommended to always check the result of the conversion and declare the status of the resources and this eventuality to users.
+
+## How to start
+
+Download the latest available version on the [Release](https://github.com/italia/design-comuni-ui-kit/releases) page. Each release includes files for both Figma and Sketch. Once downloaded, you can open the files with their respective design programs and start exploring the resources.
+
+### Component library
+
+To use the component library, you need to add the `comuni-libreria-componenti` file as a library.
+
+Below are the available guides depending on the software used:
+
+- [Add a library in Figma](https://help.figma.com/hc/en-us/articles/1500008731201-Enable-or-disable-a-library-in-a-design-file)
+- [Add a library in Sketch](https://www.sketch.com/docs/libraries/creating-and-adding-libraries/)
 
 ## How to contribute 💙
 
-How to contribute (issues, resources ecc..)
+If you want to report a problem or make an improvement request, open an [issue](https://github.com/italia/design-comuni-ui-kit/issues) using the [labels](https://github.com/italia/design-comuni-ui-kit/labels) correctly depending on the type of report.