
:origin()/pre00/f023/th/pre/i/2011/133/e/2/default_brushes_paint_tool_sai_by_lady_cybercat-d3g9856.jpg)
You can't simply pick up a program and expect to be able to create professional-grade work right off the bat, unfortunately.

Setting aside the years and years of experience required to produce art of that quality, this is what you would need to do something similar: The kind of art you're trying to imitate (by shiro on pixiv, btw- please try not to spread art without mentioning the artist) really doesn't have any special brushes that I can see.
