Please could you explain this in terms that don't reference other Fediverse systems? I don't use Lemmy or Mastodon so I'm not really sure what this means.
(Edit: ignore this point, I've just discovered that "Active" is a sort category, like "Hot", "Newest", etc.) ~~For example what is the "Active" list? I'm guessing the list of posts that are shown on the front page? or do you mean it will push my profile to the start of the "Active People" section on the right-hand sidebar?~~
And if I understand correctly, the "boosts" section on my profile is viewable to everyone? Also, is there a way to unboost posts? It seems that when I click the boost button again the number of boosts goes down, but the post is not removed from my profile.
For upvotes, these only change the number that is shown on the post itself? So people will not be able to see the list of posts that I have upvoted?