Just so you know, the acrylics I generally use are the bottled type, ie. Folkart brand, Decoart brand, or others of that type. They're the ones I learned with and they tend to be a bit less thick than the tube variety. I do use the others as well now, but those are the ones that I started with, and they are also the brands that carry the various extra mediums ie. extenders, floating mediums etc. They have lots of colors to choose from and can be bought in most Dollar stores around here anyway. The blending mediums and such you can find in Walmart or arts and craft supply stores. I've even bought some of my brushes at the Dollar store. Not the crappy little kindergarten type,(you know the ones I mean)
but they do sometimes carry some better brands.
Hope that helps.