Here is what you will need:
Pans, half pans, or tubes, watercolors come in various sets and prices. You can find a good set of watercolor paint, without spending too much. These are usually ‘student grade’ watercolors.
If you decide that you want to spend a little more, you will find sets of better quality: ‘artist grade’.
Starter sets will have all basic colors that you’ll need.
I prefer using tubes. Paint is liquid and more versatile, as it can be thinned down with water more easily as I work.
The set I am using is the Winsor & Newton Cotman Water Color 12-Tube Set
Your paper should be heavy enough to support watercolors. The thicker the better it absorbs water.
The size depends on you.
Try various sizes. I like working big scaleon A3 size paper, as well as small scale on postcard size.
Here are some suggestions:
I prefer working with a thick round watercolor brush, because it holds more water and gives me a great variety of marks.
My favorite is COTMAN BRUSH – SERIES 111 ROUND – Size 20
It is great for fine detail, lines and washes. Can be used for broad strokes yet it will also form a sharp point.
Of course you can use any size.
Always have two big jars of water next to you. One to clean your brush, and one to dilute watercolor paint with.
Keep a soft cotton towel handy to wipe out excess water overtime you clean your brush. I suggest an old tea towel, it is better than using kitchen paper.