The problem isn’t your lack of ideas. The problem is your self judgment and your resistance to sharing ideas.
You have ideas floating through your mind all the time. The hard work is not squashing them too early. Once the judgment is lowered, now you can capture the ideas. Then once the ego is lowered, you can release them into the world to be ideas.
It’s important to note that you aren’t your ideas. People criticizing your ideas doesn’t mean they’re criticizing you.
You’re performing a generous act by sharing ideas. Don’t let anyone convince you otherwise.