Yes. You can do that by either signing up to Craft with your school issued email or by changing your current Craft account to an school issued email. You'll likely want to cancel your existing plan to prevent unnecessary charges.
If you have a subscription through the App Store, you will need to cancel your plan through your Apple device settings, here's how to do it: https://support.apple.com/en-us/118428. If a refund is needed for your App Store subscription, only Apple can provide it. Here's how to request it: https://support.apple.com/en-us/118223.
If you have a subscription through Paddle, you should be able to cancel your subscription via the Craft app: How To Cancel My Subscription? Should you need a refund for your Paddle subscription, please reach out to our Support Team.
Do you have more questions about the Education Plan? Check out our full Craft Education Plan - FAQ