There are two steps first change your email and then buy a subscription.
Change your email address:
a.Register for a DataCamp account.
b.Select My Account > Account Settings from the top-right corner of the DataCamp home page.
c.Change the email address associated with your DataCamp account and click Save Changes.
d.You can now access DataCamp with your own email address.
Buy a Subscription:
You have the option of purchasing a monthly or annual subscription.
Note:
You will not be able to acquire an Individual Subscription if you have not yet been separated from your Business Organization. Please contact your Admin if you want to be removed from an Organization.