It depends on if your domain provider support domain pointing service.
If yes, you need to point your domain to a certain IP address which represents your portfolio website. You can request your IP address by sending an Email to email@example.com, in your email you must provide your domain name.
However the easist way is to transfer your domain name to foliovilla. Send an Email to firstname.lastname@example.org and we will guide you step by step for the domain transfer.