Changing redirection URL

The easiest way to do that, would be to go to “Donations > Settings > General” and change the “Donation Success” page to be your homepage.

If you want to have different confirmation pages per form, you’ll need a PHP snippet like this one:
https://github.com/impress-org/give-snippet-library/blob/master/form-customizations/conditional-successful-donation-redirect.php

Let me know if that clarifies a bit or if you have additional questions. Thanks!