Not sure how to position myself in this current market

Hello I'm a software engineer who spent ~10 years almost single handedly building the frontend design systems and architecture for an international fortune500 consumer retail conglomerate. During that time I learned a lot about the marketing efforts and content that large brands use on their websites to build their ecommerce sites.

I left that job but have been very unsatisfied by a 9-5. I'd like to start a digital agency or ecommerce consultancy of some sort but curious how I would best position myself and services