Just a tiny write up with some Link recommendations I want to put here.
1. privacytools.io
This one is a great page containing a lot of useful Information and Links how to improve your everyday privacy on the way through the web. Not only for beginners also some good useful Information and recommendation for experts. The Page is setup by some reddit users in privacy chan and is updated frequently.
[Link]
[Link]
2. Kickball awesome-selfhosted
This Awesome list is huge, a collection of open source self hosted Services and tools. A good place to start if you search something specific without reinventing the wheel.
[Link]
[Link]
3. Awesome-sysadmin
This list does not need to hide behind the one just mentioned. Main focus on sysadmin tools, open source. Not only self-hosted web apps, also native Applications and tools.
[Link]
[Link]