I use strictly AirDry paints and have for several years now. I currently use several different brands myself and have tried almost every brand on the market. The one I would recommend for beginners that is easy to use, cost friendly and great quality are Waterborne. I did make a tutorial to go along with these paints and it was created with those new to using air dry paints in mind.
Here is a link to the paints to go along with my tutorial and a link to my tutorial. If you don't want to purchase those there is also a link to just the paints and a free written tutorial for the paints :)
http://hunnybunsrebornsupply.com/waterborne-air-dry-painting-class-set-for-use-with-april-yaps-ebook/
http://www.sweetiepienurserybyapril.com/eBooks.html
http://hunnybunsrebornsupply.com/all-paints/waterborne-air-dry-paints-mediums/
http://hunnybunsrebornsupply.com/free-tutorial-using-art-magic-waterborne-air-dry-paints/