How to cancel a flight with Spirit Airlines

I am an inexperienced traveler who booked a flight to Seattle for a family wedding. Situations have come up for me to cancel or change my flight.
The flight is through Spirit and I wanted to be clear about the wording of their policy.
2.4.1 - No refunds will be given for cancellations and any remaining amount will be placed as a credit and may be applied to future travel. Such credits are good for travel booked within 60 days of issuance for travel on any flight dates available in the system and shall not have any cash value. Source
Does this mean that:
- I have to take a flight within 60 days of the initial booking
- I book my flight within 60 days of the initial book and can go on said flight on day 61+?
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How to Cancel a Spirit Airlines Flight: Cancellation Policy \u0026 Fee
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Images: AMAN, Fariz Priandana, Jeffry Surianto, Nguyen Hung