1. How do I Manage Hide/Show Donation Setup in Page Template
In WordPress Dashboard go to Appearance submenu and click on Customize.
After clicking on customize you will in theme Customizer.
Here you have to click on Page Template than Donate Page
In Setting you can hide and show the Donation Page in Donation Page Template by clicking on hide/show button.
Go to Customize -> Page Template -> Service Page -> Setting -> Donation/ Sponsor Hide/Show
2. How to Create Donation Page Template
Go to Dashboard -> Pages-> Add New Page -> Follow screen shot here.