Background Choices

It's not a problem extending the umbrella but you'll need to search up some tutorials on the pentool.

With the pentool you can do some pretty well controlled curves and create the umbrella. To colour in the umbrella, simply use the eyedropper, collect the colours and to create the same colouring scheme as the scan you might need two colours from the umbrella and a smudge tool to smoothen the colours out- so do check out the pen tool.

Unfortunately you'll have to use your imagination on what the rest of the umbrella should look like- but it shouldn't be too much of a problem: follow the curves and you should get a point. Take a step away from the monitor and have a look if the umbrella is in proportion or not and it should be okay :D

http://www.imanimetions.net/tutorial/tutorial.php?view=pentut
http://www.vectorage.com/tutorials.php
http://www.heathrowe.com/tuts/vector.asp

To continue the sunset you might want to have a look at the cloning tool. The cloning tool might take a while, but it's worth while if you want to create the same effect over and over.

Here's one of the cloning tool (more for editing manga, but you only really need to know the concept of it)
http://kalendel.cjb.net/

Background Choices

WateryAura

Inuyasha-FAN

kuroimisa