New here

I am new here as the title says. So hello. I really would like answers to some stubborn questions:

What does AoS stand for? Can't seem to figure it out.

Also, some of my maps aren't poping up any players including me, what's the problem?

It would be awesome if someone could answer these questions.

AoS is Aoen of Strife, also what people refer to as the "genre" for maps such as Tides of Blood, Desert of Exile, or DotA.

About your map problem, do you mean you can't find it in the map list when you go to host a map? If that is the case, the path is probably too long (e.g. Maps/Downloads/Some Other Folder/Maybe Even More/The Map Could also have a name that is too long.w3x).
If you mean that you can find your map but you are unable to host it, it's probably a trigger problem - likely you have the return bug still in your map, or a false positive return bug.

Aeon of Strife was a custom map made previously in starcraft which had the same gameplay style of those maps mentioned... or so I heard.

And I don´t understand what you mean in your second question.

welcome :)

Welcome! I agree with Fledermaus about your hosting problem; it's likely your map has something like the return bug H2I code in it, or something similar. In the new patch, having that code in your map makes it not show any players in the creation screen.