Market->product fit. Tell me more, what else? Best questions to potential customers to find product

In the beginning phases of trying to find product ideas to develop by communicating with a certain market that already exists.. I have the ability to message and communicate w/ these people and in the vein strategy such as Nathan Berry (Convertkit) and Andy Drish (The Foundation), I'm asking questions to dig into the real pain points and frustrations to find common threads worth tugging to see if there is a solution I can offer in the form of an mvp to build upon...

So things like, what are your frustrations day to day and trying to dig deeper when they give some sort of answer, and layering down: tell me more, what else?

From there I'm having difficulty keeping them engaged by asking the right questions for valuable info...

Thoughts?

PS. I'm not a developer and do not know how to code but we'll get to that once I have the info gathering stage set...

Thx!