You can see if you are already itemizing by looking at line 40 of your 1040 here:
My Account-Tools- View Tax Summary- Preview 1040. Is line 40 $6300? If so, that would mean you'd need an extraordinary amount of W2 based expenses to itemize. Expenses related to non-W2 income (freelance/ 1099MISC/ cash) do not go in itemized deductions. They go directly against this income. But, the expenses need to be related to the $750 worth of work.
