Do you want to get a PRINT portfolio up there? If so, can you convert ads you have into pdf?
Do you have a website at all? Do you have a host account with fantastico?
If you have nothing, then maybe taking a word doc and putting a table of contents and making a pdf with samples would be the way to go at first. Then you just have to make one page, the landing page, with a link to the pdf.
Meanwhile you could be developing those pages and link them up once you are done.
Here's how I do mine if that helps. Some clients want to see it broken down by category so I added the client list version. It's been very popular with clients. You know if they sell bath mats, they want to see if you have bath mat experience. Because we all know you can't possibly get up to speed on bath mats without prior experience.
Freelance Copywriter Client List Print Ad Portfolio- freelance copywriter