The key here is to not make the light direct because it’s generally unflattering. Instead, make it indirect and therefore the light source appear larger. Then they add in other tips like looking into the camera vs not looking in.
Beyond this though, I recommend working with an actual photographer who will work with you on your wardrobe, figure out what about you to put forward in your images, direct you and knows about posing and putting you in the best poses for your body type, etc. It probably won’t be cheap, but you’ll be paying someone who actually cares about the art and knows how to make you look good.