Been in e-commerce since 2014 using companies like Gearbubble, Viralstyle, Represent, and Teespring. Selling through Shopify since 2016. Merch by Amazon since 2017. I can help you if you're getting started or want to know where to begin.
The fastest way to monetize it with no following is to offer a service. Maybe you have an expertise in a certain area. Sign up for a Clarity account and put links for it on your blog.
To me that is the fastest way to monetize it from scratch.