One on the hardest aspects to real estate is looking stupid. I don't want to sell until I know what I am selling.
Here is some ugly news. I have been doing this for 14 years and I still get stumped with questions. I am clear that I do not know everything and there is 100% chance that I never will.
However, my best learning experiences have come from being in front of people and having to make it through. I have not always got the business, but I have never received the business when I did not jump in.