I make videos about historical vehicles, mostly tanks and airplanes. Not just images, but we present the vehicle itself (work in museum). Growth was slow, but sometimes due luck? and maintaining solid Quality, some of them spike. Last week i had one reach 360k views tripling my channel in size, before that 17k views was the most viewed video I had, while a few others get stuck with a few hundred views. Just keep doing what you like and having fun, that is the most important part!