Curved mesh, a side and making a face?

Hi
Sorry for asking a noob question. I’m just starting with blender.
I’m trying to make a curved blade, so I made a curve, convert it to mesh and merged one vertex with a one vertex of a plane. But there’s problem, how do I make a face? Only way i found is to subdivide plane and manually select 4 verticles and form a plane… but that would take long time with around 150 verticles…