Not sure what kind of problem you have from this. It should not be problematic to add PayPal button to WordPress website with plugin (Paypal Buy Now button) or with GiveWP plugin. Check out https://qodeinteractive.com/magazine/how-to-add-wordpress-paypal-button/ this tutorial, should help you with adding PayPal button to WordPress. Also check out those plugins that are built for donations https://wpklik.com/wordpress-plugins/wordpress-donation-plugins/ If you have some specific problem, please just explain to details
... View more