Is.... Melanie on Salt Spring Island, BC. Congratulations. Now, Melanie, YOU have to e-mail me to give me a shipping address. If I don't hear from you in a few days I will pick someone else, but I hope you do check in to read this.
To answer some of your questions, for info on High Flow acrylics and Golden Open Acrylics, go to Golden's web site or see my Tutorials page. For information on acrylic mediums, go to Golden's web site. For other brands, go to the manufacturers' web sites or see Blick Art Materials' videos. The Utrecht matte medium does come in smaller sizes than the gallon I use. Other brands of matte medium tend to be more fluid.
You can gain a lot of information by just playing with your paints. Ask a specific question, and then answer it yourself by trying it out. Can I use a hair dryer on acrylic paints? Try it. Is this paint opaque? Try painting over black stripes or a strong color with it. Can I mix brands? Can I mix mediums? What happens if I add loads of glazing medium to my paint? What happens if I add water?
Ultimately, you gain knowledge of your paints by using them a lot, but the above resources, plus your own time and curiosity, will contribute as well. Thanks for all your comments!!