Installing a WordPress theme is easy.The first thing you need to do when you want to install a new WordPress theme is to login to your site admin page. Once there, go to Appearance -> Themes.
Here, you will see all the themes that are currently installed in your application. To add another one, simply click on the Install Themes tab.
On this page upload a theme of your choice from your local hard drive. Note: The theme should be in zipped format.
Now, click the Choose File button, select the archive of your theme from your local computer and press the Install Now button.
In few seconds(or in a few minutes depending on the speed of your internet), WordPress will upload and extract the theme archive for you. All you need to do next is to press the Activate link under the message for successful theme installation.
That’s it! You can now go to the front end of your site and see the newly activated theme.Next will be customizing the theme that you have just installed.