[Sameron]

Sounds like your problem is more with taking action than having the right knowledge or intuition. Having worked in consulting a bit, you come to understand effective communication is something you just have to do, it's what you're selling. If you had a feeling the "spec" wasn't quite accurate and still set out on just following it - guess what? You messed up. Someone else wouldn't and that makes them better.

You can be an introvert, you might be shy, awkward, whatever. But do you want to do a good job or not? They aren't mutually exclusive.

When all you need to do is say something or ask questions - it doesn't matter if you're a smooth talker or a total mess. What matters is doing it.