There's no shortage of information sharing though. Have you actually looked, at all? There are lectures [1], books [2], documentation [3], and countless personal pages [4].

[1] https://www.youtube.com/watch?v=yxhJA2uRr_g

[2] https://opensource.com/downloads/pragmatic-guide-systemd-lin...

[3] https://systemd.io

[4] https://medium.com/@sebastiancarlos/systemds-nuts-and-bolts-...