We always recommend a business model where you start small. That way, you can spend more money as you build your audience and start to sell more digital art and graphics.
The good news is that setting up a digital store is much easier and cheaper than opening a physical shop. You can start with SiteGround EDD Hosting for $5 per month and use free plugins and themes to limit your costs.
By using Easy Digital Downloads to sell your artwork, you can avoid many of the upfront costs and middleman fees you can expect when selling via an online marketplace such as Etsy. Instead, you just have to pay industry-standard credit card transaction fees.