Fear is the thing that makes you insecure.
Doubt is the thing that KEEPS you insecure.
When it comes to creating for a living, doubt invades trust, and we end up 2nd guessing ourselves. "Is it good enough?" "Am I good enough?" "Will anyone like what I'm doing?"
The funny thing this doubtful thinking rarely helps you improve your skillset, and if you let it, it will influence your work to live up to a standard that belongs to someone else, and you end up trusting what other people judge about your work, rather than your own vision or intrepretation.
The remedy? Answer these questions about what you do: "Does this represent me?" "Is my message clear?" "Has my effort produced the intended result?"
These questions, over time and if asked over and over in your process will give you clarity of vision and your authentic style. You'll be able to trust what you say, what you do, and what you have to offer, finally, because the measure of "good enough" doesn't depend on others.
Trust yourself. You're pretty amazing.