There are hundreds of beautifully designed and professional looking themes to choose from in Wordpress. While most of the themes are available for free, others are premium themes that are marked as such and available for a purchase price.
You can search for themes and design ideas at the Themes home page. Just simply scroll down and you'll begin to see the many theme options that are available.
If you want to search for specific themes, click on the "Find A Theme" search button and you'll see search and filter options.
Popular Searches is a simple way to start. You can also type in a keyword search if you already have an idea. Filter options are another great way to enhance your search with more comprehensive choices.
Wordpress allows you to try a free demo. This is a great tool that gives you an idea of how the blog theme will look on your screen. For example, if you select Photography under the Subjects filter, the photography blog themes will appear. As you move your mouse over the image, you'll see the Live Demo button.
Spend some time with the search and filter options to see what is available and what piques your interest.