Yes, selecting hobby when entering the 1099-NEC will cause the income to be reported appropriately on your tax return, as Other Income.
Since you already filed your return, you will need to amend. Wait until your original return has been accepted, then you can amend as soon as the federal amended tax return, Form 1040-X, is available for filing in TurboTax. Use this tool to check availability of forms, including 1040X: Tax form availability
Here is some more information on filing amendments: How to File an Amended Tax Return with the IRS