Hi: sorry you’re facing difficulties.
So with regards to the time it takes for the order screen to complete, can you confirm if this is generally a problem on your installation with WooCommerce (perhaps by creating a regular, ie non-ticket, product and attempting a test purchase) ?
I will get a confirmation email of the order but the event available tickets do not register.
Can you confirm if the orders are marked as complete? If not and you update them accordingly, are the ticket emails then dispatched as expected?
Thanks!