That's why I'm a huge advocate of always starting a side business while working full-time, so that you can test your way into your new product or service, get feedback, validate the business idea, and start generating income before you quit your job. If you can master the art of scaling a side business idea while keeping your day job, you'll have no trouble succeeding once you're fully self-employed.
If so, you might want to consider running your own online thrift shop. Whether you focus on fashion especially, another category of product, or prefer to amass collections of interesting items from all over the internet (but especially eBay!), there’s always a strong demand for items with a story. Give your store a compelling, memorable identity, and it will be seen as much more than a simple consignment store.