I'll share what I know.
Oils are not terribly different than acrylic. The major differences are in the time it takes for the paint to dry and the clean up.
Oil paints don't dry when they are cold, and one thing many oil artist do is put their paint and brushes in the freezer to keep the paint moist.
The paint can be thinned using mineral spirits or oil paint thinner, but it needs to be used carefully. The same stuff is used to clean the brushes, but it can be very hard on acrylic brushes so you will want to invest in oil paint brushes. I don't know exactly what the difference is, but there is a difference.
If you want to use oil and acrylic, one thing to keep in mind is the waterbased paints don't stick very well to the oil paint, so you will need an intermediate sealer so the acrylic has something to stick to.
You will also need to be aware of the kind of primer you use. Your type of paint will dictate the kind of primer you use. In general, the automotive primer, which is what I use the most is just fine, but the more common game store variety which is water based may not work as well.
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