You can redirect customers right after successful payment. In order to do that;
1) Global Redirection #
Set a target page from PaddlePress > Settings > Preferences. It will apply to checkout buttons that doesn’t override the data-success parameter.

2) Shortcode Parameter #
Pass data-success parameter to [paddlepress... shortcode. Eg: data-success="https://example.org/thank-you-for-payment"…
If you are using PaddlePress Billing, you need to use data-success-url instead data-success. E.g:
[paddlepress_billing price_id="pri_01j0zsxbpbn0safkn5krhc28g6hc" label="Buy Now!" data-success=”https://example.org/thank-you-for-payment”]