The most important thing is to practice and you will improve. I do colour washes all of the time, as I really love them. You've asked for an example, so I thought I would post my first one as well. I've also put in my first Grandma's Flower Garden. Keep up the effort. It will teach you a lot about colour.
I have cramped conditions so hope you get a good enough idea from the pix.[ATTACH=CONFIG]424522[/ATTACH][ATTACH=CONFIG]424523[/ATTACH]