Hello,
Thank you very much for choosing our theme and for contacting us.
1. Header.
You can change the background and text color (light or dark scheme) in the row settings of the header builder: https://xtemos.com/docs/woodmart/header-builder/header-rows-columns-configuration/
You need to configure which social networks you want to show in the Theme Settings > Social profile and then add the Social profile element in the Header builder and set the mode: share or follow: https://xtemos.com/docs/woodmart/header-builder/add-edit-builder-elements/
Footer is configured in the Theme Settings > Footer. You need to set the layout and number of the columns, then add the content in the Appearance > Widgets > Footer column 1,2,3. You can set one column and add any content created with the builder used on your site by means of HTML block: https://xtemos.com/docs/woodmart/html-blocks-2/ and https://xtemos.com/docs/woodmart/html-blocks-2/#main_footer
Instagram – please follow this instruction to integrate: https://xtemos.com/docs/woodmart/faq-guides/setup-instagram-api/
If you have any questions please feel free to contact us.
Best Regards