I think it's great that you want to learn how things work, but if you are still at the stage where you don't understand the basics of electrical circuits well enough to know, without needing someone to confirm, that if there is no load then there will be no current then you really should do some studying which is properly structured, rather than asking random questions to try and eliminate the niggling things that you might think are all you need to clarify.
The problem with your approach is that you are only going to ask about the things you realise you don't know or don't understand. If there are things you don't know but don't even realise you don't know because you don't know they even exist then you won't ask about them. Ditto with things which you think you understand but are actually wrong.
There's not much that Donald Rumsfeld and I see eye-to-eye on, but he was spot on when he said:
There are known knowns; there are things we know that we know.
There are known unknowns; that is to say there are things that we now know we don't know.
But there are also unknown unknowns – there are things we do not know we don't know.
