You should paint on masonite board or canvas. I know that painting on paper is popular right now (and cheaper), but I don’t recommend it for anything other than canvas. The reason for this is that if you paint something you turn out to really like on paper, and want it framed, it is very difficult to frame paper paintings. The paintings really need to be without glass, but that ruins anything done on paper, which needs glazing. The paints (especially oils) will outgas and form a film on the inside of the glass that will need to be opened up and cleaned every so often. The oils may also begin to eat away at the paper itself. Acrylics are much more suitable for painting on paper if you get the urge, and there are retarder mixes that can be used to give more of the feel of oil paint with a longer drying time. Oil paints dry to the touch within a week to several months, depending on how thick you apply the paint; however, to truly dry takes a very, very long time. This is why you see cracks in very old paintings… all oils will do this eventually. I am not so sure about the long term effects of acrylics. (I use these almost exclusively at the moment.)
Oil paints are also toxic and many of the pigments contain lead or other chemicals that you should not get on your skin, so you want to make sure that you avoid skin contact, wash your hands afterwards, and unlike me, don’t eat the stuff. Keep it away from pets and small children. You will also need Turpentine/Mineral Spirits for duliting the paint and cleaning your brushes, as they cannot be mixed with water. On the other hand, most acrylic paints are non-toxic and all of them can be mixed with water or special mixing solutions, and the brushes clean up with regular soap and water. I use acrylics these days because I do not have a well-ventilated area to use oils; I have to take my paintings outside to put the top varnish on them.
The “coating” someone mentioned is varnish. An oil painting should be varnished within a year of completion, but probably not within six months of finishing to make sure it is completely dried. Acrylics can be varnished within a day or two, typically. It is imperative that you varnish your painting if you do something that you would like to last for a long time. This is the #1 crime of all the amateur, unschooled and/or hobbyist painters that come in my store. Paintings are ideally framed without glass or glazing, and the varnish is what serves to protect the surface of your painting from dust, durt, grime and the elements. I myself use a permanent acrylic varnish on my paintings with about three coats because I like it very glossy, then I use another, removable, archival varnish with UV inhibitors to prevent fading and light damage. The top varnish is the important one. As someone mentioned “wiping down” the artwork to get the dust off – this is possible, but not really the best thing for the artwork. The proper function of varnish is to cover the painting. Once the painting is dirty, or the varnish has begun to yellow (though many synthetic varnishes now do not), the varnish is removed, taking all the nasties with it, and a new coat is added – like throwing out an oil piece of glass. You may never have to redo the varnish is your lifetime, but it is important that you do include it with your painting should you do anything that you’d want to give to family members, pass on to your children, or sell, etc etc. I am always having customers call me and ask if there’s anything I can do for their dirty/damaged/discoloured artwork and more often than not they bring the thing in, some long lost family member made it, and low and behold, no varnish. All I can do is refer them to a conservator and hope for the best.
Bob Ross will teach you some excellent tricks for very easily making some lovely and impressive paintings, but in addition to any videos I highly recommend you check out a book from your local library (or purchase one if so inclined) on the basic techniques of acrylic/oil painting, including how to stretch and prime your own canvas, keep your brushes in good shape, choose and mix paint colours and pigments, and properly varnish and care for your artwork. You never know what might become important to you or a family member one day, and IMO it’s important that you’re not only aware of how to make the picture, but also prepare it, preserve, and care for it for years to come.
If you have any other questions for me feel free to post them. I’ll shut up now.