Good luck on your journey and I hope you are able to spread the skills & knowledge you pick up, far and wide! I am a big fan of the value-for-value model.

Just for info, the creator of that site (Anita Posch) is a proof-of-work grass-roots activist. She travels through African countries (& possibly wider through the world), listening, educating, sponsoring and donating equipment (eg RPis) to help local scale communities to find some financial escape routes from the oppression of both thier governments and (ultimately) the IMF etc. I'm happy to support her in whatever small ways I can. It was through her podcasts that I found Matt Odell... so I will always have a soft spot for her!

If you are interested, her podcasts are freely available, e.g. https://fountain.fm/show/GEO1bBIhUkFLCnAaqXQ5

But if you are looking specifically for info on best practices for security & preserving privacy, then you are probably better of starting with something like Jameson Lopp's section on Bitcoin Privacy within Swann's bitcoin cannon, 
https://www.swanbitcoin.com/canon/bitcoin-security/ (I apologise if I'm telling you things you already know). although I don't thin he specifically addresses the topic of using p2p.

I'll come back if I remember / find anything that seems more relevant to your question.