What should be my next step for this fat girl?

I like fat girls a lot. I saw one at the parrk jogging against me , the second time I saw her I gestured her a thumbs up she smiled, i am little fat but not like her she jogged more than me so I like her more, then the third time , I was leaving for home, I waved at her and she said Hello while walking away with a smile.

How Should I approach her next day, I want to talk to her and either date her or just remain friends.
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9 mo
this complete scenerio was just one day
What should be my next step for this fat girl?
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