So, were I to run a Fediverse instance on my own personal computer, would other instances that have annexed me still be able to see my posts even when the instance is down (that is to say when I shut my computer down)? Or would I need to keep my computer running at all times?

Also, approximately how many resources would running an instance where I'm the only registered user require?

I don't have a dedicated computer that I could turn into a server, so turning my own personal computer into one seems like the most convenient solution, but I just don't know if it'd work well.

Thank you for your time!