Thinking of starting coaching business – worried about response

I am just thinking of starting a coaching business. I truly believe I will be good at it and have identified a niche in which I have experience. (well a couple, but I can sort that out later).
My concern now, and I know it’s just my thoughts, is how people will perceive “life coach”. This hit me today when I was thinking about changing my linkedin profile (or creating a new one). Also across social media – how will friends colleagues react?

The answer, of course, is “Who cares how they react?”

I just can’t seem to get past this. (I have some friends/colleagues who are very “judgy” and one even laughed at me.)

C: friend laughed when I said something
T: she doesn’t take me seriously
F: shame
A: nothing -> second guess myself and my decision
R: not moving forward in coaching business