plough a lonely, your own, etc. furrow
plough a lone(ly) furrow
To do something in isolation; to act without the help of others. Primarily heard in UK. I tried to offer Jonathan help with the project, but he'd rather plough a lone furrow.
ˌplough a lonely, your own, etc. ˈfurrow(literary) do things that other people do not do, or be interested in things that other people are not interested in: There are several English teachers at the school, but Jeanne continues to plough a lonely furrow, teaching French and German.
A furrow is a long narrow cut in the ground made by a plough (= a large piece of farming equipment used for cutting the soil).