An automation that imports subscriber data regularly and updates key data extensions is what NTO should create as a good first step to add automation to its email marketing. This automation will help NTO keep its subscriber data up-to-date and consistent across different data extensions. It will also enable NTO to use this data for segmentation, personalization, reporting, etc. An automation that deletes old data extensions, emails, and reports may be useful for cleaning up unused assets, but it is not directly related to email marketing. An automation that contains several recurring emails and decisioning points may be too complex for a first step and may require more planning and testing.