My best suggestion is to develop another skill that could be distantly related to the skill you already have. In my case, before I retired I was good, not great

My best suggestion is to develop another skill that could be distantly related to the skill you already have. In my case, before I retired I was good, not great at circuit design and was good, not great at developing firmware in C. With those two skills, I did not go unemployed. As far as boredom goes, most professions/vocations have long periods of boredom. I once asked a helicopter pilot if he ever got bored. His reply was that flying helicopters entailed long hours of complete boredom interspersed with moments of shear terror.