Honestly i've been having them for my entire life and the only real advice I can give you is to learn how to use make up (make up techniques, how to contour and brighten up your face, how to do eye make up well etc) and especially how to use full coverage foundation. Eye bags aren't your only problem - discoloration of your under eye area is another => make up can help. If you've got the money then I would advice you to also get hyaloronic acid injections into your under eye area. It will last you for about half a year to a year and will fill out your uye bags as to make your eyes appear less sullen.
Once they're there youve kinda got to live with them but as I said above it's not hopeless.
You look 'scary' not just because of your under eye area (eye bags, discoloration) but also because your skin looks unhealthy. Eating well (and or learning how to use make up) will fix that. Hope that helps xxx