Building a freelancing system for web developers – would love feedback

I’ve been working on something for the past few weeks and figured this would be a good place to share it.
I’m building a practical freelancing system specifically for web developers — whether they code traditionally, use AI tools (Vibe Coding), or work with WordPress.
The core problem I’m trying to solve is simple:
Most developers know how to build websites.
Very few know how to consistently get clients who pay well.
A lot of freelancing advice feels either too generic or written by people who’ve never actually freelanced as developers. I’m trying to create something more practical — focused on positioning, client acquisition, pricing, proposals, contracts, and delivering work professionally.
I’m currently collecting early feedback and waitlist signups while I finish the first version.
If you’re a developer who’s freelanced (or tried to), I’d genuinely appreciate hearing:

What was the hardest part for you when starting out?
What advice did you find actually useful vs useless?
Is there anything you wish someone had told you earlier?

Here’s the waitlist page if anyone wants to take a look:
https://dev-afop-waitlist.vercel.app/
Happy to hear any thoughts, even critical ones.