I read those papers too. And I write code and train models day in and day out. I could get very specific on what needs to be done, but that's what we do at our job. If you're curious, I'd say join the field.
I agree with you in that I don't think for a second anyone can make an accurate prediction of when we will AGI, but I have no doubt that it will be relatively soon, and that OpenAI will likely be one of the leaders, if not the leaders in creating it.