Okay, if you need a refresher on how to add and activate a plugin:

https://my.wealthyaffiliate.com/training/how-to-mo...

But, basically, go into your Wordpress dashboard > Plugins > Add New

Type in "Landing" and perform a search.

There are several to choose from. Check out the details and I recommend reading reviews and the seeing how many others have installed the plugin before I invest my time in energy on setup.

But, for this training, I'll show you one I tested.....

Inbound Now Landing Pages:

It's a decent one for free.... but, careful, while it will setup nicely, it doesn't have integration for MailChimp, GetResponse or AWeber.... at least not in the free version.

But, it will work fine for a landing page for a product. If used as a squeeze page, you'll only get the email addresses save to your WordPress and not passed on to your autoresponder (newsletter).

But, let's see how it appears inside WordPress to give you an idea of capabilities.