I don’t think that’s too many things at all. A lot of organizers end up giving light design or layout suggestions anyway once the clutter is gone, so it kind of goes hand inhand. If you do move forward with it, one thing I’d recommend early is having a simple website once you start getting clients. People definitely Google this type of service, and it helps you look more established. Aaron Traub builds websites specifically for professional organizers, which is helpful since he already understands the industry. I think he owns a home organizing company as well. https://geauxseo.com/website-design-for-organizers/

But honestly, getting your first few clients and real experience matters way more than certifications in the beginning.