You can add some margin to the bottom of you share module.
Please use the following in your Theme Options -> Custom CSS
margin-bottom: 60px !important;
Is this not possible?
Also, the share button is not visible on my home page, even though it was activated.
Yes, it’s possible, but you have to ask the Jetpack Plugin author why it does not work on homepage.
That share button is produced by Jetpack’s share module, not a product of our theme.