Hi Raduhendix,
Welcome to the JNET community, let's learn and explore together.
I suggest you to register for this course, JUNIPER OPEN LEARNING: JNCIA CLOUD. Follow the link below:
https://learningportal.juniper.net/juniper/user_activity_info.aspx?id=10483
Do your pre-work by going through the material and attend the webcast and ask as many questions as possible to the instructor to better your grip on the concepts.
The content of this course along with the material should be sufficient for one to go ahead with certification.
[KUDOS PLEASE! If you think I earned it!
If this solution worked for you please flag my post as an "Accepted Solution" so others can benefit..]