embou

Hi, I’d like to use the Jetpack Blog Subscriptions sidebar widget, but it takes a lot of real estate in the side bar with the large “subscribe” button and large gap between the email field and the button. I’d like to make the button smaller and place it at the right edge of the email field. I am just starting to learn how to use wordpress and don’t know much about CSS. Is there an easy code that would make the above modifications that I could paste somewhere? And if so, exactly where would I paste it?

Thanks so much for any help.