dear Johnny,

There are so many shops they sell the decorative items. In Lulu hypermarket, some collections are there. Just make a look at them, sometime you can find the painting as you like.

you can also order it through the internet. A lot of web sites are provided to sell their the paintings.

In Muidher, There is one art painting shop, near post office, you can also search there. Actually I don't know more about his paintings. I had just saw the shop when i was passing on that way.
Hanging of frame is very simple. Fix the two nails at the frame. Each one of them should be opposite side at middle side of fame and tide with a thread. The thread should be loose when you tie with nails. Fix a screw on the wall with screw plug. Then the painting can be simply hung on the wall.
** when you select the painting, also consider the color of wall.