Help with Widgets

Hi,

I am a newbie to the blogging world and am requesting some help with the widgets. I want a widget that asks the blogger to enter his/her email address and click the subscribe button to subscribe to my blog. I have looked for a similar widget all around and have found nothing. Please direct me as to where I can get a widget like the one I described above.

Example : https://www.escapefromcubiclenation.com/ – the right corner has a subscribe feature that I want on my blog.

Thanks