Purchasing the rights to a stock photo is fairly straightforward. You can just Google it. What you may want to invest more time in is researching if your plan

Purchasing the rights to a stock photo is fairly straightforward. You can just Google it. What you may want to invest more time in is researching if your plan to use someone else's photo will maximise your employability. My guess (though not particularly educated) is that there are hiring managers who wouldn't consider you to be immature for doing this. Unfortunately, they're unlikely to be the sort of hiring manager who would give priority to minority women. I could, of course, be wrong.