you can open your map, go to "file" and there's a button that says "export package" and what it will do is create a ".osk" file which you can then send to people, and this works like a normal map file where you open it and it will add the map. btw, you will still have to export it every time to save the new stuff, and there wont be an online version with its own page, just a download file. (it should open the folder, but if it doesnt, it should be in appdata>local>osu!>exports
hope i helped lol