There's a good reason for these things being mentioned everywhere. Take blogging as an example. Tons of ways to monetize your blog and get into affiliate marketing over time. Free tools (or at least offering a free plan good enough to start) you can use - WordPress, social media, QR code generators, Chat GPT... Or let's mention dropshipping. Plenty of resources to get you started, an incredible amount of tips and best practices shared on different forums. We actually live in times that are great for shy people, in my humble opinion. However, we all need to keep in mind that every option takes time and effort. No investment - fine, possible but there's no magic shortcut to setting up a decent source of income.