New To Podcast - Simple Question to Get Started

My operating system is Windows 10 and I’m new to podcasting. I have not downloaded Audacity yet but I will today. In the meantime, I’m excited to get my podcast up and running. Audacity is highly recommended but before I get started, here’s my question. 1) My first guest lives on the U.S. West Coast and I live on the East Coast and I need to select a meeting or conference method so I can see and hear him clearly. What is the best program to use for an interview that interfaces or works well with Audacity? Zoom? Skype? Phone interview using a speakerphone (landline)? One of my future guests said he uses a speakerphone and Audacity.