Re: Covers for beginners.

#2
With that question I'm assuming you can't draw, or you would not have that problem.

In that case your best option is a montage - there are several websites/artists that offer so-called free stock pictures for photomanipulation. you can for example search for "free stock" on deviantart or go to opengameart.org and look for parts to use (make sure to always check the artist's terms of service, some of those stock are not free or require a link of the result to be send to the artist or other conditions).
Then use an image program of your choice to combine the stock pictures into one picture you want to use as a cover.