I'd suggest starting with https://docs.dgraph.io/get-started/, and then going to...

mrjn on Feb 16, 2019 | parent | context | favorite | on: Why Google needed to build a graph serving system

I'd suggest starting with https://docs.dgraph.io/get-started/, and then going to https://tour.dgraph.io. It gives you all you need to understand the query language (based on GraphQL) and get you up to speed building your first app on a graph DB.

staticassertion on Feb 16, 2019 [–]

I'll echo this - I learned about graph databases using DGraph.