If you are beginning to explore ecommerce and want to test the waters of selling on Amazon, having a sole proprietorship is perfectly fine.

But if you decide to pursue an Amazon business further, you should eventually open an amazon llc https://pirscapital.com/blog/amazon-corporate-llc-everything-you-need-to-know-about-forming-an-llc/

An LLC (Limited Liability Company) is a U.S.-specific legal entity designed to protect owners from debt and other liabilities. Unlike a sole proprietorship, an LLC legally separates the owner(s) from the business. This means you won’t be personally liable for any debts and lawsuits your business may experience — the LLC will be responsible.

LLCs can have multiple members; a sole proprietorship only has one.