I am a video content creator, do i select "this is my main income" or "this is a business" or both?

[VolvoGirl]

Did you get a 1099NEC?  It doesn't matter what you pick.  You need to file it on Schedule C as self employment income.   Actually you can just enter it as Other self employment income or as Cash or General income. You don't need to get a 1099NEC or 1099K. Even if you did you can enter all your income as Cash. Only the total goes to schedule C. You should be entering the income from your own records.

You can enter Self Employment Income into Online Deluxe or Premier but if you have any expenses you will have to upgrade to Premium or the Self Employed version. Or use any of the Desktop CD/Download programs.

How to enter income from Self Employment
https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...

Where to enter business expenses
https://ttlc.intuit.com/community/entering-importing/help/where-do-i-enter-my-self-employment-busine...