You can't apply expenses against hobby income. Doing so causes the income to be business income, not hobby income. Prior to 2018 you could deduct hobby expenses on Schedule A as miscellaneous deductions subject to the 2%-of-AGI floor, but the Tax Cuts and Jobs Act of 2017 suspended those deductions through 2025.
https://www.irs.gov/newsroom/tips-for-taxpayers-who-make-money-from-a-hobby
