I need to quench my thirst for knowledge and learn something new just for the sake of it.
I’ve already learned:
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Equations and pivot tables in Excel
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Vector graphics in Inkscape
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Music mixing in rekordbox
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Personal VPN on a raspberry pi 4 with OpenVPN
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LAMP stack web hosting
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Streaming & video capture with OBS
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Manual & automatic backups with FreeFileSync
Things I’m open to:
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FOSS (even beta) or free-as-in-beer software
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A high or low learning curve
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Tools for niche fields that I’d otherwise have no reason to learn


Kubernetes (ala k3s) you can make any collection of computers a cluster and play with automation of apps and services
KiCAD play with circuit board design with FOSS.
FPGA programing! Tons of use case for when you need near line speed but can’t afford the time and money it takes to build a full ASIC.