I worked as online tutor for Chegg, Inc, received 1099-MISC box 7. I only did it in 2017 as a hobby. I don't know how should I file it? Is it non self-employment?

I worked as online tutor for Chegg, Inc, it is education service company. I don't think it is self-employment, but not sure. I only did it for a hobby, and only in 2017. Since I received 199-MISC with box 7, compensation, how should I file it?