working PT while starting coaching business – HR

I am starting certification with the Life Coach School in October. Can’t wait! My plan is to take the entrepreneur track. I have been off work for about a year and have considered working part time (about 25 hrs per week) while starting my business. Probably for the first year. I am wondering what kind of feedback you hear from people who work part time while starting their business. Do they say they wish they had not done it or that it took away from their business? I am sure it depends on the person. Just looking other people’s experiences to give me more to think about or things I had not considered yet. Thank you!