Is Nirvana the goal, for Zen and Theravada? What is the main goal for Theravada Buddhism and Zen Buddhism? Is it Nirvana for both or is there any additional differences?

Can the answer be detailed because this is an assignment and I am trying to be as detailed as possible. Thanks so much!
There is no goal in Zen. To have a goal is spin the wheel of samsara. Zen is all about getting to the basics, which are beyond words and concepts. I should know I have been practicing Zen for seventeen years and I am still a beginner.