The workify builder allows you to customize your storefront homepage and add hustles to your service page. At this time, you are not able to add additional pages or a page for your blog. There is also no feature to add a footer, to link to outside pages or blog.
These may be available down the road, but there is no available estimate on when.
You can add third party tools like hello bar or elevio (in code) to your storefront > custom head section. This will allow you to add tools that link to outside pages.