Best Practices ?

Goodmorning everyone,
I'm competently new to AWX and I have a bit of experience in using ansible. 

I was wondering if there are any best practices in using AWX? 

For example, recommendations like these: http://docs.ansible.com/ansible/latest/playbooks_best_practices.html

I tried to import some of my roles (written according to ansible best practice, from a git repository), I'm probably wrong in using it, but I do not think that AWX has correctly interpreted the directory structure. 

As well as I would like to import roles from the galaxy but I did not understand how to do it.

Thank you very much

G.