Seo for ecommerce or make a seperate blogging website?

I am looking for the best way to get people to my ecommerce website. But i am not sure if i should create a seperate website just for blogging and linking my ecommerce website on the blogs. Or i should just start blogging on my ecommerce website ( i am using wordpress with woocommerce). Will google index me lower if it is an ecommerce website?