What happens next?

How to take on a tomboy style
Choose the tomboy style you want to have.
You get the outdoorsy, no-flair tomboy style (outdoor gear), the super sporty tomboy style (lots of sports clothing) or the street wear sporty style with graphic t-shirts and and dog funk hats.
Start with shoes.
This means no high heels or ballet flats, but there is more to it than this. Choose either skater shoes, or runners, with a masculine design, and preferably a brand such as converse, reebok etc.