As sibling comment says, use a website builder instead. Something like shopify will have everything you need (though I’m not massively familiar with it myself).

Another suggestion I have is to focus on the target audience. I skimmed the doc you linked to about uploading images (couldn’t find any extra docs on the site at a glance btw) and it felt geek heavy in terminology.

The shots of the device look nice, but there’s an app for managing it? Is it easy to use? If I buy this device would my wife ever use it or is it too complicated?

Are you actually making these devices yourself? If I were hand making these my starting point would be to sell to friends so I could iterate on the whole thing. There are a lot of people on here talking about ads and marketing but honestly, hustle is how you get started.