Claiming a domain name for free

I completed the “Make a Website” course where at the end you can claim a domain name for free from Name Cheap for a year.

Question: Can I claim this at a later time so that my one year time frame doesn’t start running already?

I finished my site as instructed from the course but I would still like to make plenty of more changes before going live and I would hate for the time to just be running on my free subscription.