Wordmark - https://www.canva.com/design/DAGGa-BAW_k/P9BKGWLIc_9GLecUekEd1g/view?utm_content=DAGGa-BAW_k&utm_campaign=designshare&utm_medium=link&utm_source=publishsharelink&mode=preview

Page Break - https://www.canva.com/design/DAF0WgPW4HY/d205XuVS7MKBRdcXu7qGHQ/view?utm_content=DAF0WgPW4HY&utm_campaign=designshare&utm_medium=link&utm_source=publishsharelink&mode=preview

Logo/ or you can use a photo and put it inside this template so Substack accepts it -

https://www.canva.com/design/DAGIk1_XcwE/yZIhVAhq52PlDIEkdRg4nw/view?utm_content=DAGIk1_XcwE&utm_campaign=designshare&utm_medium=link&utm_source=publishsharelink&mode=preview

Signature to edit - https://www.canva.com/design/DAFwjjhLxQk/z3NIc3gsZ4YGQSd3l07C5g/view?utm_content=DAFwjjhLxQk&utm_campaign=designshare&utm_medium=link&utm_source=publishsharelink&mode=preview

Advice from Substack - https://support.substack.com/hc/en-us/articles/4408381685268-What-are-the-optimal-image-dimensions-for-my-Substack-publication#:~:text=Social%20%2F%20post%20preview%20image%3A%20We,ratio%20for%20the%20preview%20images.