You can install Formello in two ways: from inside WordPress or manually uploading the zip file.
From your Dashboard, go to Plugins > Add New.
Ypu can now input on the search box on the right "Formello" and click on "install" button.
Once you activate the plugin you will see a new form block inside the editor.
If you prefer, you can download the .zip file from the official site or from the WordPress repository by clicking here.
Then you need to upload to your site. From your admin dashboard go to Plugins > New and click on Upload Plugin.
Choose the zip file you have downloaded and click on Install Now button.