I have just taken up drawing and I'm wanting to start adding some colour. I'm drawing in pencil then outlining in ink. I bought some Derwent pencil crayons but I found them far too hard for my liking. They're digging up the surface of the paper (cartridge paper) and they don't blend well. Can anyone please recommend a softer pencil crayon that's suitable for beginners (i.e. not super expensive)?