First you want to make sure your eyes are at half mast constantly, make sure your face looks like you’ve never felt a single emotion in your entire life. Next you’ll want to write some extremely vague lyrics anyone can relate to, think of your music like a daily horoscope. If you csnt think of anything vague then just jot down that you’re gonna fuck someone’s dad or something lol. Last but not least, make sure your ass and titties are so big that you can wear xxxxxxl clothing and they still can be seen, this part is crucial. Congratulations, you’re now billie eilish