The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system. Our efforts emphasize portability, standardization, correctness, proactive security and integrated cryptography. As an example of the effect OpenBSD has, the popular OpenSSH software comes from OpenBSD.
The IRC NOW network make extensive use of Open BSD in their services, and offer a range of these services as they encourage use, they are offering introductory and administration training for free. They do have shell accounts available
The training pages are on their website, but support is VIA IRC or Internet Relay Chat via their own servers (it is decentralised, so there are a good few servers linked together.
I am posting this here, despite this being a Linux user group because I feel there is some relevance, there are certainly skills that would be useful and are transferable to the Linux world
There is no reason we can’t discuss Open BSD on the Linux user group mailing list or Matrix / IRC channels.
Not linked to IRC now, but there is a OpenBSD Matrix community.