How to upload a picture to this club as a regular size photo?

It just depends on the size of the image. Whatever the size of the image that's where it's going to go. You just need to check the size of the image. Here's some ex:
larawan 250px sa pamamagitan ng 250px or smaller will go to icons.
Images: 1000px sa pamamagitan ng 1000px or larger will go to wallpaper. larawan 400px sa pamamagitan ng 400px or larger go to mga litrato or fanart (but that's sa pamamagitan ng choice)

Hope that helps :)