I have to say duality is one of my favorite art "subjects". I could totally see this on my wall or on the walls of some designer apartment. The use of lots of muted colors and just a few vivid ones make it easy to look out without appearing dull. Purple and pink seem to look fantastic with the grays and I wonder what the letters and the lines in the image are really supposed to represent... or did you just choose them for their shapes and forms? (See, Lakota SIOUX)
it's very open, your objectives, your techniques, etc. some people go there with pencils, chacks, others with watercolours and they all sketcht with the same speed and fluency with their own tools. and the objectives change also, some people go to sketch hands or feets that are difficult for them, other people go to do shadows, others to do positions, its very flexible !!!
Your style reminds me of a set of Tarot cards I have. I love that set (Voyager) because of its clip art design. Everything in the card symbolized something. I feel like that's the same in your work, you don't just arbitrarily put random images together to make a simple scene, each piece seems to represent something to you regarding the scene you are to portray. I'd really like to know what you meant to say in this piece.
You're so young but you're very talented. I can tell that you see a lot of details in the faces of people that you portray in your art. Keep working at it and make sure you're doing lots of observation, drawing from references for practice, and, when you're ready, work in values and colors. I highly suggest you look on YouTube and search for a guy named Prokopinko, he has an enormous selection of videos about drawing. Some of it will fit into your style, some of it wont, but it's always important to keep practicing.
400 people? Damn girl most schools here in the $tates got more students than that, and I'm even counting Elementary Schools. That has to be a teeny village.
Czech Republic eh? Some very beautiful Women in your Country which makes sense--you're among that echelon of Beauty.