Affinity Designer: What’s needed to make individual hairs look more natural?

I’m using the pencil tool to draw individual hairs. I changed the pressure to give them a smoother appearance. However, the start of the hair still looks rough (see picture below). It looks too rounded and it does not look natural. By changing the pressure on the start of the brush the hair looks thinner than what I’d like. Consequently, I need to increase the pencil width and I’m back to the same issue.