Pretty much everything you said is okay, absolutely.

Ideally, as long as you aren't promoting or advertising your own social media page or sharing your account username in the Public chats (#shoutbox for example) or in Threads & Posts. These kind of things are only allowed to be shared via DMs or stored on your profile.

As far as forum communities, yes, you are permitted to share them as long as you aren't mass-advertising it. You are considered to be mass-advertising when you have posted the forum/chat room link in multiple areas of the site, repeatedly and non-stop. For example, you posted these links in a thread, sent it to multiple people in DMs, and also sent it inna public chat room multiple times.

Obviously, if you need any further clarifications, feel free to ask again.

ok, this makes sense, thanks for clarifying, I was always a bit unsure but this was actually pretty helpful

Ideally, as long as you aren't promoting or advertising your own social media page or sharing your account username in the Public chats (#shoutbox for example) or in Threads & Posts. These kind of things are only allowed to be shared via DMs or stored on your profile.

As far as forum communities, yes, you are permitted to share them as long as you aren't mass-advertising it. You are considered to be mass-advertising when you have posted the forum/chat room link in multiple areas of the site, repeatedly and non-stop. For example, you posted these links in a thread, sent it to multiple people in DMs, and also sent it inna public chat room multiple times.

Obviously, if you need any further clarifications, feel free to ask again.