A.C.
If you have a smart phone, download the Michael's application, and also sign up for texts through them. Then you will always have a 40% off coupon with you.
I have never tried a paint by number, so I am not sure what to tell you regarding the colors and blending. I do draw or paint almost every day, and here is what I suggest:
The products you use will often make or break the final product. For instance, I bought a clearance pack of crappy watercolor paper from Michaels for $2.50. Keep in mind, I have always loved art, but after having kids it has been on the back burner for many years, so I have been re-learning the last few months. I was trying my hand at watercolors again, and I could not blend the colors to save my life. Turns out, it is the paper. I started reading reviews on Amazon.com (which, by the way, you can buy pretty much any art supply through and have it shipped right to you; the prices are very low AND there are customer reviews and tips for each product!) and I went out and bought good quality paper this time with my 40% off coupon, and the results have been amazing. Also, you can buy canvas paper packs at Michaels. The paper is heavy and textured like a canvas and great for acrylic paint. I would suggest that over regular canvas to start out so you can practice. I like the Liquitex acrylic paints.
May I also suggest sites like Etsy and Pinterest. I find that by looking through them, my creative juices start flowing and I have lots of ideas on things I would like to create.
Lastly, you might find coloring to be a fun hobby. You can buy adult coloring books at Michaels, Barnes and Noble, or off Amazon. I have a bunch of really neat ones: Japanese kimonos, fairies, Indian mandala designs, Art posters, stained glass... it is an easy way to feel artsy without investing too much money. Many of the coloring pages are quite intricate, so it can take a few hours even to complete one. It is super fun and you can do it while you watch tv even. Good luck