How do I paint on Canvas?

As suggested, start by buying a canvas and priming it with Gesso. Gesso is water based and will dry quickly. Two coats are better than one, but try to make it smooth as you don't want ridges in funny places in your finished painting. I also recommend acrylic paints for beginners. Also get a retarding medium which you mix into the paint just before applying it to the canvass -- it will keep the paint "workable" if you want to blend two painted edges together. Another good tip is to squeeze your blobs of pure paint onto a dampened paper towel -- it will keep the paint use-able until you need to mix it with another color. Buy only red, yellow, blue, black and white paints -- this will help you learn to mix colors. Have fun!

To paint on canvas, first, you need to prime it with primer. Or, you can buy it already primed. Then, you should use paints that will adhere to it such as acrylics or oil. As to actual techniques, thinners, etc, you might want to ask an instructor as it gets more complicated after that.

I have read all answers you got so there is nothing I want to add more. Priming is really a vital factor. Then use of knives is really a technique. For references go to www.oil-painting-technique.com, www.oilpaintingtechnique.com www.download.com(search for digital art softwares)

first i paint the whole canvas with one colour like blue,black,yellow or orange.then when the colour gets dry,i draw the picture of my choice & colour it.

its very easy first of all you nedd oil paints of good brand and a canvas u also need some brushes and oils to mix in oil paints so they wont dry early now when your done you have to decide what u want to make if ur good at drawing its very easy for you if ur not then try to make 1st abstract art paintings bcuz in abstract you can making any thing in any style