How do I use a landing page theme with wordpress?

I recently bought themeinjection’s Accommodation landing page theme for wordpress, this one in fact ( ), but I’m new to this stuff and I can’t figure out how to apply it to WP.

Secondly, I use Inbound’s Landing Pages plugin and wish to upload the theme through it to get the marketing features. According to their documentation it is possible to upload custom/external themes as long as it is ‘landing page plugin’ ready. The documentation gives instructions in doing so: but it’s way over my head.

Who do I contact/hire to get this done?