website for a homegrown women's wear label

As a homegrown women's wear label, I have already designed a website on WIX. I am looking for someone to optimize the website, so that it is most compatible with all desktops/laptops and mobile. I am also looking for someone to manage the SEO's I'm also looking for a reliable content management system that will allow me to make necessary changes in the future, as well as features like blog/news section and custom forms or user registration.

I'm looking for an experienced and creative web designer to develop this website project and am hoping to hear from some Freelancers who can provide their suggestions and expertise to make my vision a reality.