Understand the risks involved and enjoy the process. You will make mistakes. Learn from them and go on. Refusal to select and target an audience. No one can sell their services to everyone a message that goes to everyone is unlikely to create a sense of urgency in anyone in particular.
Attorneys focus on one type of law.
So should you. Choosing the wrong audience. A market that can not or will not pay or an audience that is too small or dispersed is a recipe for disaster. The same problem exists when trying to reach an audience that is dispersed over a large geographic area and not easily identified. Fuzzy or unfocused message.