Might be obvious, but their videos and tutorial articles are way over the top for a little importer / retailer. Fair warning, they'll either have you grabbing your current supplies inspired for a project, or shopping for stuff.

I’ve taken to painting with charcoal lately.

I draw with vine charcoal, smudge and adjust, then wash it on canvas with a brush dipped in water, it makes a nice watercolour style effect. I suppose it’s more like gouache after reading this.

I started experimenting with compressed charcoal crayons too. I dip them in water then rub directly into canvas. It gives a very strong black which is perfect for accents and dark surfaces.