Pablo thanks for your reply, but I'm not working for any company at the time.
I just want to learn adobe campaign by watching your video tutorials and putting them in practice in a learning module of adobe campaign (if you have something like that) 
I'm not interested in using adobe campaign for its purpose (marketing campaigning...), I just want to learn it.
Is there a way to have access to adobe campaign (free or paid) so I could just learn how to use it?
(I don't need a certification or any credential, just want to learn it for my self and if it will be needed in the future I will go for certification)