The free software movement is actually inherently political. Much of modern digital infrastructure is built using tools / software that embodies collectivist ideologies. I would be very surprised if the Lemmy developers even claimed that they created Lemmy in some sort of apolitical clean room (not that it is even possible).
Enjoy the ride! I too have been building PCs for a long time (since the 90s in my case) and went down the rabbit hole of NAS / self hosting starting about 7 years ago.
In that time I went from a Bitfenix Portal SFF case, to a Deep Silence 6, to an 18U cabinet… so fun and lots of learning.