Log onto your Plesk Account.
On the Dashboard, click on 'Applications' on the left-hand side of the page.
On the Applications page, click on 'Featured Applications' from the list of suggestions on the page.
Find the Wordpress application and click on 'Install' to the right of it.
You can access your Wordpress account from your Plesk Control Panel. Click onto 'Wordpress' on the left-hand side of the page and in the general info for the website you would like to login to your Wordpress account on, click on 'Log in' beside Administrator. This should take you to your Wordpress account.