i understand ur struggle, and its a very real thing to feel as though you have no identity in a capitalistic society that "sells" you your personality and interests. the best thing i reccommend you do is to unlearn that behavior first. unlearn to rely on items as a means of self expression. yes ofc fashion and makeup are great ways to express who you are (things that i love and partake in) but its important to recognize that this is a behavior we are taught; you buy something in the hopes it will achieve something, like how we buy band tees even tho we're total posers because we want to seem cooler than we really are. to live authentically and to discover who you really are as a person, you need to question WHO you are. what are your values? what are your thoughts on life? how do you feel about your existence? our life on this earth is limited and this is something everyone, regardless of religion, can agree on. instead of trying to find your identity thru what you can purchase, try to find it by questioning what it is you want from life. eventually, you will find that as you explore your values, morals, and desires you will naturally gravitate towards things that fulfill that. for example, i have a personal interest in human health and biology and i explored this interest by learning about nutrition. now, i love to cook and i love to make my own recipes. finding yourself shouldnt feel like a task that needs to get done. its more so something you do for the rest of your life, even as u die. to live is not "to find yourself", but rather to live a life that feels fulfilling. hope this helped!