Hi, Rafael.
The primary source for Aruba certification track training is the Aruba Worldwide Education Services team and the HPE Global Training Calendar.
We have a virtual class which supports the new Aruba OS 8 and the ACMA exam, IAW v8. Link to schedule.
We've also recently released a self-directed elearning and lab package available here.
Offerings from our Authorized Training Centers are available on the HPE Global Training Calendar & Certification site.