Youth Arts Crew

I need copy for several website pages, but finding someone locally has been difficult. I started looking at an online copywriting agency instead. The online part is convenient, but I wonder if communication becomes harder when everything happens remotely. Has anyone worked with an online agency before? Did you communicate through email, calls, or a project system? I would really like to know whether the process felt smooth or confusing. Hearing about someone else's experience would help me know what to expect.