For Viya admin in general, there are a few courses available, the introductoty are free:
https://learn.sas.com/administration?sas_curriculums_2[]=platform%20administration&sas_software_prod...
When it comes to migration to Viya (from SAS 9.4 I assume), you could get some basic help and guidelines from SAS. There are toosl available, like the SAS9 Content Assessment Tool and the Enterprise Session Monitor. Check out this presentation from SAS Explore:
https://communities.sas.com/t5/SAS-Explore-Presentations/Best-Practices-When-Planning-for-Your-Migra...
For Viya on Azure specifically, this could be a starting point:
https://www.sas.com/en_us/solutions/cloud/microsoft-azure/viya-integration.html
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Data never sleeps