Acting like you are more professional than you really are is important.
I made about 4 or 5 videos, uploaded them as unlisted and uploaded my artwork before I started my channel.
The reason for that was:
1. I wanted to look professional
2. I wanted to have enough videos to back fill my "lazy" days.
I'm not speaking from youtube experience, but just my own habits. APPEARANCE IS EVERYTHING, fake it until you make it