How does Lightning Network work at a real level?

So, I’m trying to understand the basic functions of lightning, theory in Practice. This is what I mean.

The theoretical introduction begins with the assumption that Alice and Bob want to pay each other without a chain settlement each time. So they Open the channelPlace the SAT that moves along the channel, etc. Even if Charlie and Alice want to swap out the SAT, they can both use their existing channels to bob without opening their own channels.

But in reality, all I do is use my aqua wallet Generate an invoice Or pay the merchant invoice. I have not seen channel concepts or anything like that at the user level.

Therefore, I need to bridge the gap between these two seemingly different worlds. As an example, assuming I’m booking a vacation in Trabara, they’ll give me invoice Pay 800,000 Saturdays. So when I pay using my aqua wallet, channel And like that? Are there any resources to learn about this?