How difficult is a career in Medical Billing for a beginner, and what should a fresher expect on the job?

Hi everyone! I am currently exploring career paths in healthcare administration and am very interested in entry-level medical billing.
Before committing fully to this field, I want to understand the day-to-day realities of the job beyond classroom training.

If you work in medical billing, revenue cycle management, or health information, I would appreciate your advice on the following:

Real-World Difficulty: How complex is the workload for a beginner? Is the main challenge mastering medical coding updates, understanding insurance policies, or managing claim denials?

Pace and Stress: How fast-paced is a typical day, and how do you handle the pressure surrounding high accuracy rates and strict filing deadlines?

Onboarding Expectations: What does the onboarding process look like for someone with zero prior experience? How long does it usually take to feel competent?

Key Skills: Beyond basic computer literacy, what habits or soft skills help a novice medical biller excel?

Thank you so much for sharing your time and industry insights!