I find that acrylics dry very fast - which is supposed to be its charm; however, I find that because of that quality they don't blend as nicely as the oils. The oils, for one thing, are softer and more flexible than the acrylics. Also, the colors are brighter with oils.
You can not do what you want to do unless you know the correct technique. The only other way you can learn how to do it is by doing it yourself, which would take twice as long than if you went to school.