Creating fill-in-the-blank worksheets

I am a health coach working on a new program that will be more interactive for the client. I am in the process of making worksheets and wondering if you have any guidance on how to go about making ones like Brooke has for SCS where it downloads as a PDF that can be filled out. Do I start with a Word doc then revert to PDF once I complete it? I do have Canva and am wondering if this could be incorporated as well to make it a more aesthetically pleasing design. Thank you!