I think it’s normal to feel this way. The pace of the organisation totally varies. I lead content and in every set up, I have always given a month to my new teammates to settle.
If it’s a startup, it can be ambiguous to begin with. There’s so much happening that you are either pulled into projects without much context, or are given a breathing space to brace yourself for a big new project.
Explore the possibilities in your 1:1s with your manager. Tell them that you can take up more stuff, or perhaps seek clarity on the expectations from your work on the ongoing project. In terms of outcomes or impact. Ask about the metrics that the team is chasing and if they are open to A/B testing.
Creative roles can sometimes feel overwhelming because the feedback or outcome is often subjective. You have got the job, which means you are suited for it. A company wouldn’t invest in a resource otherwise. So, please don’t second guess or doubt yourself :)
TLDR: Have a chat with your manager + don’t doubt yourself!
All the best 😊