Since you’re using a Shopify-supported theme, then adjusting the position and colors of the header is something that our Theme Support team can help you with. If your store is subscribed to a plan, then you’re eligible to use the complimentary design time included with our subscription on customizing your theme. Though our Theme Support team can assist you with a number of customizations, we do have some limitations listed on our design policy for your reference. While we’re unable to provide account-specific support via the Shopify Community, we’d be happy to assist you with a customization request through live chat, email, or callback. Simply visit the Shopify Help Center and log into your account to create a support request.
That being said, I’d love to hear more about your experience so far and share some resources to help you get started. Do you have a marketing plan prepared for your store?