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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.
Honestly, mostly through the https://hledger.org/ website and just using hledger to keep track of my finances. As I encountered things that I didn't know how to do like track investments, or use different currencies (crypto), I did a little research, mostly starting with what's on the site and branching out if I need to. Having a conceptual understanding of accounting concepts helped me get started. It's quite possible I'm not doing everything exactly right, but for me it's mostly to be able to get the data I need to understand what's happening with my finances, and observe trends.