Always glad to see someone trying oils.
A couple tips though - if you want to use oils invest either in some oil-painting paper (it's primed) or prime your paper with a few layers of acrylic primer first. Otherwise the oil will seep into the paper and eventually rot, ruining the painting. If you using acrylic and oils (can't really tell what all your mixed media is here) always use the oils *over* the acrylic and not vice versa. Oh, and have fun! Lots more info int he oil forum.
Like your colours in this one.