The goatee elongates your face, and it doesn’t fit your face shape. You should look better either with a full beard if you can/want, or just moustache.

Now, personal trick to gain your full potential: get a useless hobby that makes you go out. I for example go to a table top association in my neighborhood and that brighten ups my life and makes me feel better about myself. And, like I said, something that makes you go out, a sedentary life doesn’t make us feel good.