Any security anti-patterns for vibe coder I should avoid?

Hey everyone 👋

I’m a designer who also loves to code, I’ve been vibe coding and building my own little apps lately.

But honestly… I’m kinda scared to publish them because of security

When I started reading about app security, there’s so much info, scanners, checklists, libraries, tools…

Some of them look useful, but others feel like overkill or even risky for small solo projects.

So I wanted to ask here:
👉 Are there any security tools or practices that vibe coders should avoid? Like, common anti-patterns or traps that waste money or add fake security?

I just want to make sure I’m learning the right stuff and not spending on the wrong tools.
Would love any tips from people who’ve shipped solo projects safely 🙏