Install a Custom WordPress Theme
So you have your own blog using WordPress and want to install a custom theme. It’s easy to do — depending on your web hosting platform and how it is configured.
The easiest way to do it is using cPanel control panel. If your host has this control panel it’s follow the instructions. If your host does not provide cPanel contact me and I’ll get you fixed up. As always, I’m At Your Servers at Gmail. 
Issues: Installing a new WordPress theme is a low impact process and at the most you may have a compatibility problem later if an update includes functions the custom theme does not support. In that very rare case you can revert back to the stock theme while you get a new custom one — or have it adapted for you.
Make sure you get your theme from a reputable site! There are many sites out there that do a shabby job of theme building and are only providing free themes so they can embed links in them to monetize your traffic — or worse. So use the WordPress theme directory or some other mainstream site to make sure it’s safe to download your dream theme.
Once you have acquired the zip file, upload it into your hosting storage area using the cPanel control panel. I recommend using the ‘File Manager’ feature of your control panel instead of an FTP client because the control panel application will unpack the zip file for you making theme installation virtually effortless.
Ready to rock? Let’s get started. Step by Step…