The question is not really about income level — it is about liability exposure. An LLC creates a legal separation between your personal assets and your business. If someone claims your jewelry caused an allergic reaction or injury, and you are operating as a sole proprietor, they can go after your personal bank accounts, your car, even your house.
With an LLC, your personal assets are generally shielded (assuming you maintain the corporate veil by keeping business and personal finances separate, etc.). At $22K profit with a physical product that people wear on their bodies, I would say the liability argument alone makes the LLC worthwhile.
From a tax perspective, a single-member LLC is a “disregarded entity” by default. That means the IRS ignores it and you still file on Schedule C exactly as you do now. There is no change to your tax situation unless you elect S-corp or C-corp treatment. So the tax complexity is minimal.
The $100 filing fee and $50 annual fee in Georgia is quite affordable as states go. You would need a separate bank account, which is free at most banks, and you should get a new EIN (also free, takes five minutes on the IRS website). All in, you are looking at maybe $200 for the first year and $50 annually after that. That is cheap insurance.