Hospitals and clinics are very busy places to work, and it is important that medical assistants can keep on track with the schedule and can work precisely and efficiently.
I would say that these are the interpersonal skills that one would need to become an effective medical assistant.
Usually, clinics will offer training to new medical assistants (unless stated in the job description), but having certifications (CPR, EMT, phlebotomy) are always good to have when applying.
For me, I wanted to be in a career where I get to help other people and healthcare is the best industry to be in. It makes me feel valued when providers give me kudos for my efficiency. That is, I make sure that patients are seen on time and that we have all the information we need prior to their visit because this helps the providers immensely. Your goal is to manage the flow of the clinic and make sure everything runs smoothly so the question is, how will you achieve it?