By default, WooCommerce handles login and registration through the /my-account/ endpoint, and when an error (like empty fields or wrong credentials) occurs, it reloads the same page with the error message.
Sorry, but there is no option in Theme Settings available to redirect to a custom page.
It requires customizations, and this is beyond our limitations and support policy.
How much would it cost for you guys to do it, do you have any rate lists for custom updates, and is it safe to update will it not be gone when there is an update with the theme. Thank you