Just the sheer number of themes can make it difficult. I took 5 weeks to find mine and glad I did not rush it. Like Diane said, use the filter feature to held narrow down the choices.
And like Mark said, concentrate on content and you can always
change your theme.

Mark

Hi - well, with over 7000 to choose from, I am sure there must be something suitable! Within the themes section, there is a feature filter, which might help. You can pick a subject, such as education or photography etc, and choose different layouts.

all the time, but the theme is not what will make you money, its the content. I used to spend days/weeks deciding on a theme, wasting valuable time when i could be producing content to attract traffic. Don't dwell on the theme too much you don't want it to be a distraction from the content. We are not making websites that have to look amazing, we make websites to help our visitors and in turn hope they make money for us.