Unfortunately we will always face rejection and criticism in one form of another, and often the fear of that leads to people not following their dreams and goals. I would suggest trying and seeing how you go. If the criticism becomes an issue then begin to look at other avenues.

With youtube as well you can choose to turn off comments if you are worried about the reactions or begin to struggle. It would allow you to say what you want to say and reach the people you wish to reach without so much of the negativity.