How do I get started? To become an Interior Decorator (this is different from Interior Designer) I recommend starting a website, take quality photos of your work, ask friends and family if you can work for them at no charge to help add to your portfolio, once you’ve created a polished visualization of your work you can then start to charge for your service.
If you're ready to enter the ecommerce fray, you could sell your own stuff. Of course, along with selling your own stuff on your own website comes a whole slew of both responsibilities and technical configuration and requirements. For starters, you'll need a website and a hosting account. You'll also need a merchant account like ones offered by Stripe or PayPal. Then you'll need to design that site, build a sales funnel, create a lead magnet and do some email marketing.