Have you ever struggled when using watercolours? Do your paintings sometimes have visible streaks or lines once the paint has dried?
The simple lessons to learn are to pre mix your washes of colour and work quickly once you start painting. If you are in a warm place your paint will dry even more quickly so try to work without distractions!
Here is a very simple video to see how it's done.
Music credit: Kathryn Williams "Soul to feet"