Agree, it certainly looks like a schoolboy drawing.
I'm playing around with the trial version still but tried to use some more features. With the basis of a photo I took I applied "sargent" preset and followed up with "soft reveal brush" under the retouch tab to get a bit more details of the cows heads and it worked very well.
I've made the decision to buy the license solely to print a "painting" to hang on my wall :)
Nice work!
Maybe you can earn back your investment by selling some 'paintings" to people.
For instance make a nice shot of their house or garden, and sell them a nice print for their wall.
I am sure it will work!