Add intro paragraph, move contributing there

README.md

@@ -1,3 +1,11 @@
+This here is a list of useful resources made for the Complexity Science community, by
+the community. From the events to attend, to the social media accounts to follow, as
+well as great materials to learn more about complexity science, we aim to provide all the resources that anyone who would like to enter the world of complex systems science would need.
+
+The list is only as awesome as the community makes it! If you have anything to add or
+suggest for this list, head over to the [contributing guidelines](https://github.com/yrCSS/awesome-complex-systems-community/blob/main/CONTRIBUTING.md)
+for more info. **All contributions welcome!**
+
 ## Societies and networks
 > Ordered alphabetically.
 
@@ -126,10 +134,3 @@
 - [awesome-PhD](https://github.com/helenahartmann/awesome-PhD)
 - [Awesome Public Datasets](https://github.com/awesomedata/awesome-public-datasets)
 - [Collection of advice for prospective and current PhD students](https://github.com/pliang279/awesome-phd-advice)
-
-
-## Contributing
-
-This list is only as awesome as the community makes it! If you have anything to add or
-suggest for this list, head over to the [contributing guidelines](https://github.com/yrCSS/awesome-complex-systems-community/blob/main/CONTRIBUTING.md)
-for more info.