First things first... You should never tag internal links on your site/landing pages with UTM parameters since that can seriously mess up your Google Analytics.
Unbounce offers a native GA integration. You just have to turn it on and copy/paste your GA Tracking ID. Here is the relevant documentation about it.
The native integration would automatically push data to GA about: button clicks, link clicks, variants and form submissions.
Now, you can and should tag your email links with UTM parameters so once your visitor lands on the landing page you can track their interactions.
As far as SharpSpring tracking goes, I took a quick look at their documentation. If you placed their JS script on your landing pages that should be sufficient for them to track any further information from the LP.
If that's not the case, I would reach out directly to ShartSpring support and let them know what you are trying to accomplish.