I have a personal instance I run for stuff like testing bots, so it isn’t very highly federated (I just sub to a couple communities to make sure it is working). However, I just checked and the whole docker compose stack is using 250 MB of RAM and ~1% CPU on a single core VPS and consuming ~300 MB of disk space.
Of course YMMV depending on how much you use it and federate.
This community used to be much more active, but there was a large exodus of the most active users after some far-reaching admin interventions (like this one) that saw a mod get removed from this community and the episode discussion bot unable to post here any longer. A lot of the activity has moved to a different instance/community. The reason people aren’t linking it directly is because admins have previously removed any comments/posts that link to it (including over two months of the pinned weekly discussion threads). It shows up on lemmy community browsers like lemmy-explorer though.