At risk of oversimplifying, I think you should just post things that interest you and join discussions where you have something worth saying. Sometimes there won't be any conversation, because the fediverse is relatively small, but conversely you never know when some super niche subject will happen to be someone's interest, or their area of expertise.
That's a particularly lengthy effort, even for Windows, so I'm wondering if you switched from nvidia to AMD or something major like that.
Only thing I would have done differently is uninstall the old graphics driver before switching the hardware - but that is perhaps a very old expectation, so I don't know that it'd be reasonable in your case
Kingdom of Loathing had (has?) a basic English literacy quiz that was required before you can chat with other users. I am continually disappointed that we don't see more of that.
The weird irony of android is that google's devices have given you more control over the hardware than other OEMs for a really long time. If you wanted to buy a phone and then immediately put a custom ROM or alternative OS on it, you'd usually have an easier time with Pixels than anything else.
At risk of oversimplifying, I think you should just post things that interest you and join discussions where you have something worth saying. Sometimes there won't be any conversation, because the fediverse is relatively small, but conversely you never know when some super niche subject will happen to be someone's interest, or their area of expertise.