Golang Web App与NewRelic的集成

How do I get all the metrics into APM?

I have tried the following: https://github.com/yvasiyarov/gorelic

It does very minor insights of http, like mean response time, and not tracing external calls and all the transactions including endpoints details like Java agent.

Any resolution? Even if I have to do instrumentation in the code, what would it look like to get it into APM?