I have used several books on watercolours to get started. I have listed them in order of difficulty. These books have templates you can trace onto watercolour paper. For the Strathmore books, there is a website with tutorials.
Watercolour Flowers Kelly Eddington Strathmore. Not available on Amazon
Watercolour Flowers Wendy Tait Search Press
Ready to Paint Watercolour Landscapes -Terry Harrison $ 21.95 (from the UK. He uses some custom brushes that you have to order from the UK. They do add interesting texture to landscapes.
Here are a few other choices that look interesting, but I haven’t used.
Ready to Paint in 30 min. Street Scenes Graham Booth
Recommandations on watercolour paper
On Line tutorials I have reviewed and found helpful.
Tara Lever another site with tutorials recommended by another blogger.
Finally a facebook page with some fabulous watercolour artists.