Your pitch ends with a link, and the link does most of the closing. If a brand taps through to an empty page, the conversation ends there. So I'd put the page up before you pitch anyone.
Two things make a page worth opening
One sample, pinned at the top. A short video or a photo with a product you already own. One is enough to start. Ten seconds of you on camera tells a brand more than a paragraph about you could.
One line about you. Who you are, what you make, who you make it for. "Skincare for sensitive skin" is bookable. "Lifestyle" isn't.
What a first sample looks like
One product, one angle, window light, no set. That's a whole sample. If it's spec work, made for a brand that didn't hire you, say so in the caption. Spec work is normal in every creative job. Just never let a brand believe it was paid.
Why one link beats a DM full of files
A brand contact almost never says yes alone. They forward you. A link survives being forwarded, opens on a phone and looks the same to everyone who sees it. Four attachments and a wall of text don't.
Don't wait until it feels finished. One sample and one line is a page you can pitch behind today, and the next samples slot in later without changing the link.