People say to me 'I enjoy gardening but bonsai are something else! I just can't succeed'.
I always tell them if you keep to a few simplistic rules there is no reason not to succeed.
The often told story is how people have gone away or just neglected to water their tree and let it dry out!
In fact the landscapes that I have created are even easier. However positioning needs to be thought through due to the amount of water surrounding the rocks. A good drip tray is a good solution and easy to acquire.