Yes, it will default to Tammy, and she would win in most cases.
They will have a payment hearing, and that will discuss how Amber will pay. Usually, it's garnished wages, bank levy or if they have any assets, the bank can seize them if no payments are being made. If they refuse to pay, the judge will administer a writ of execution, which is when the bank will seize goods.
Her pay doesn't go to PayPal because she was banned from it. The courts will have to go through all of her income to determine which stream is best to garnish. This means if Amber hasn't been filing her taxes right, the court will probably pick up on it.
The number of sessions depends on the case, court's availability, etc. If she's attempting to prove slander before claiming damages, it'll take a lot longer than if she's only claiming damages, if you get what i mean.