Hi, my hair is very dark brown and wavy/curly depending on how I style it. It is a red-brown rather than a black/blue-brown IYSWIM & I have never dyed it. I am noticing white and grey hairs appearing at the front (as well as a clump in my eyebrow ) and wondered where to start re colouring? Is home dye realistic for someone inexperienced? How should I pick a shade? Or is it straight to the hairdressers to spend money I can't really afford 