Definitely spend time with your users. I would observe them doing their daily tasks (around the product you intend to develop). I would first just observe and then later follow up with questions on a second round of observations. You are going to want to understand their goals, their hopes, their fears, their frustrations, and their moments of using their tools before their process, during their process and after their process. Usually those unspoken moments will give you a lot insight.

The hard part is asking those questions in the moment and how get what you need answers by those potential users. A UX expert will understand how to pull out the information you need (which I train both UX employees and Product owners in gathering insights). I would be happy to answers any of your questions in this research gathering stage and what to do with that information going forward.