Every subreddit has its own vibe. Some have fully transitioned here like linux and some of the meme sharing communities. Many have not. I cannot really think of communities on Lemmy that do not exist on Reddit.

Office Space, but also the IT Crowd

Cloudflare has a free tier for their security services. Worth checking out IMHO -> https://www.cloudflare.com/plans/free/

Run a live version of kubuntu from a usb drive to confirm wifi/lan drivers work and you can access the internet.