Now that your blog is installed, you want it to look nice. Oftentimes, your web designer can match your blog to your site for a reasonable fee.
Blogger comes with many themes ready to go, and WordPress offers many within the WordPress installation Appearance / Themes area to choose from. A quick search for WordPress or Blogger themes will gather plenty of results, both free and paid. One of the more popular ones is found at http://themes.wordpress.net
If the Theme that you are installing provides instructions, be sure to read through and follow those instructions for the successful installation of the Theme. It is recommended that Theme developers provide installation instructions for their own Themes, because Themes can provide special optional functionality that may require more steps than the basic installation steps covered here. If your Theme does not work after following any provided instructions, please contact the Theme author for help.
Add Your New Themes using the Administration Panels
You can download Themes directly to your WordPress blog by using the Add New Themes option in the Appearance sub-menu.
Log in to the WordPress administration area.
Select the Appearance panel, then Themes.
Select Add New.
Either use the Search or Filter options to locate a Theme you would like to use.
Click on the Preview link to preview the Theme or the Install Now link to upload the Theme to your blog,
Or use the Upload link in the top links row to upload a zipped copy of a Theme that you have previously downloaded to your machine.