For a 23-year-old who hates their job and wants to build their own Leveling Up, what is your simplest advice?

Pick one skill that solves a real problem, like editing shorts, writing newsletters, or running YouTube ads. Get good enough to charge real money. Then reach out to people a level or two below the biggest names, show them actual work you have done, and ask for a small retainer. Do good work, ask for introductions, and repeat. That is how you get from zero to $10K a month.