Once you register a domain, it's yours – even if it's spelled wrong. We suggest you register the correct domain right away, if it's available. You may cancel the misspelled domain if you like, but we can not refund any part of the registration fee.
You might consider keeping the misspelled domain and directing it to your main (correctly spelled) domain. If you misspelled your name, others looking for your website might do the same thing. Owning a misspelled domain allows you to capture visitors who would otherwise be lost.