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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
These aren't advanced - any Go book or course covers them. Go over something like https://www.gopl.io/, or any other book/course and then just look things up and read the docs as you're writing code.
Then might want to look at Jacobin, which is a project developing a JVM (Java virtual machine) in Go. It includes a detailed roadmap of the source code, which lays out the architecture of the code and makes it easy to jump in. The code itself is well commented and there are numerous tests, which provide additional insights.
NOTE:
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