http://r53zi7kxyqd72fuvhztzi25fo2bze7fqjefze7k6t6kiq74pzaq5suyd.onion/posts/2025/openbsd.html
OpenBSD's FAQ section covers most of the basics and everything comes with pretty good documentation. I wouldn't say it's easy, but it makes sense if you're used on how manpages work. For example, configuring the MPD server system-wide was more straightforward than I expected.