Do I use schedule 1 or schedule c? I have a regular job and get a w2, but I was asked to give a talk in Europe this year too and got a fee. This is an sporadic activity

The fee was $1129 but I also have $500 in unreimbursed expenses from this trip for airfare.  I want to know where to list those as well.  Schedule c instructions say it is NOT the form to use for sporadic activity but most advice says to use it instead of schedule 1 - which some say is the right form to use.  Others have suggested I need to use the foreign income form too but this seems to apply for higher amounts or significant time spent overseas.