Brands don't ask what gear you own. They ask to see examples. So the first thing I'd make is an example, for a product you already have, before anyone hires you.
One product, one angle, one afternoon
Pick one product from your own cupboard and one thing to say about it: a problem it solves, a detail that surprised you, a moment it fits into your day. Three selling points is what makes a video look like a commercial.
Then pick a shape. Talk to the camera like you're telling a friend. Or show the problem first and the product as the fix. Or just show it working in your hands.
Write five to eight spoken lines for thirty seconds, the way you actually talk. Read them out loud. If it sounds like ad copy, loosen it.
Shoot it on your phone
Face a window, never with the light behind you. Shoot vertical, prop the phone so it doesn't drift, and find somewhere quiet, because clean audio matters more than resolution. Grab a few cutaways: the product up close, your hands opening it.
Film three different opening lines over the same footage. Hook options are the most useful thing you can hand a brand.
Then cut it tight. Every pause, every "um". Burn in captions, because most people watch muted. Export 9:16 and stop. Don't polish it until it looks like an ad.
Where it goes
Pin it at the top of your page, next to one line about who you are and what you make. That's the step done. Don't buy gear first. A paid deal pays for the gear.