Ask HN: What are good resources for learning graph databases?

I've been in IT for more than 20 years. Most of my time I was sys admin for UNIX/Linux and Windows based servers. I was never a coder or developer. I'd like to switch to data analysis. Graph databases seem like a way to go. Can you recommend me good learning resources so that I could understand the concepts and terminology? I know some SQL related things. Is it the best thing for me to forget all that I know about SQL and start all over again? I don't have strong background in mathematics.