Someone will be seen as the expert in your field. So why not you?
In this context, an expert is not someone who calls themself an expert, but someone who acts as the expert. It's not about claim, it's about behaviour.
Planning your marketing activity is a task we all do in some form or another. For small business owners, sometimes it is a list in their mind of what happens when. For more sophisticated organisations it is a written plan or schedule complete with resource allocations. Whatever type of plan you use, it is vitally important to ensure you look at it with the right lens.