Make header taller or combine with feature section

I’m editing Storefront, and would like to have, instead of the default header area, a taller image with a transparent top menu and logo over it, as well as a tagline, and maybe some other elements. I’m not sure if that means I have to combine the feature section with the header or just make the header taller, but in any case, I’ve been researching how to do this and can’t find out how to do either. Could someone please point me in the right direction? I’m new to WordPress and Woocommerce. I appreciate any direction.