Contouring your face won't make it less round, it'll just give you a bit more definition. And no, you don't have to use any kind of makeup to be considered hot if you're naturally beautiful, regardless of your face shape.
Bronzer can help contour your face and make it appear thinner. Make sure you choose a bronzer that’s just one shade darker than your face so your makeup doesn’t look too jarring and pick a high-quality brush to apply it.
Carefully apply it to the hollows of your cheeks, your temples, and the edges of your forehead to give your face a longer, more distinct shape.
i have full face too, it's frustrating but i do think most people prefer the angles on peoples' faces. still, its not a dealbreaker feature. if you wanna try contouring, go ahead. but if you don't, thats fine too.