Watercolour, much like every medium has no ' proper ' way of use. It can be applied as transparent, delicate waterworks or as opaque as a gouache painting.
Some people mix it with acrylic and gouache, some use pastels or chalks underneath it. Some people ink their sketches, some erase their sketches.
Everything goes in art, a good example of this is our great master Leonardo Da Vinci who was notorious for mixing oils with acrylics. A couple hundred years after he died his pieces started disintegrating into nothing.
Back to our subject, there is no 'right' way of working with watercolour, but here are some tips that might be of help or give you new ideas of tools you haven't even thought of. Either way, I hope it inspires you to create more and perhaps even ease your way around it until you feel familiar with it enough to start painting.
Here is a basic list of tools (and a picture, for your convenience ) you will need to start painting with watercolours.
I use five d