Hi,
In the past few years there is an explosion of knowledge sharing and free content on internet around "NetApp" stuff, so I would suggest look up on the internet. Further, as I understand, your company has NetApp storage? In that case you should be able to create a 'non-guest' account and get to access to NetApp support site which will enable you to get access to : NetApp Knowledge-base/NetAppkbTV(Youtube videos), NetApp University courses, NetApp documentation site etc etc.
I guess, to begin with, all you need is some basic knowledge around ONTAP(OS)/WAFL(filesystem-snapshot), and along with that you will need an 'Ontap simulator' from NetApp support site (this will require non-guest account) and that's it - you can Start building hands-on practical knowledge around NetApp's core technologies.
In short, there are number of avenues for learning NetApp related stuff:
1) NetApp University: ( Here you will find number of free-web-based training videos)
https://learningcenter.netapp.com/content/public/production/LearningPath/TG_Customers/NAU_TG_Customers.pdf
2) NetApp forums:
https://www.netapp.com/us/services-support/university/learning.aspx
3) https://kb.netapp.com/
For 7-mode:
Introduction to NetApp storage
https://library.netapp.com/ecmdocs/ECMP1155684/html/GUID-C6A665D4-EB47-485E-B2C9-29405DEE4510.html
For cDOT/ONTAP:
https://docs.netapp.com/ontap-9/index.jsp?topic=%2Fcom.netapp.doc.dot-cm-sag%2FGUID-15555B67-E788-4258-89D8-AB324845038E.html
Thanks!
