What was your biggest mistake launching your coin? What do you wish to have known now? .. and how long ago did you launch your altcoin?
If you are going to ask in a community as big as this, that people are not all developers and project handlers. I think there are very few that will going to answer you. But there are some websites that allow ordinary people to create their own cryptocurrency in the market. I just don't know if that really works or not.