Need help with my page.

Hello again : ) I'm using Foodoholic Pro | Premium WordPress Theme for my website and wonder why I couldn't move my store's logo to central? In addition, under the logo I tried to move the content position down but it did't work. And I show from the theme page there is an orange button but how can I set it up for my page? Last question: Is there any chance that I can setting my screen size in mobile and desktop still the same without breaking anything? Thank you so much looking forword to hearing from you! Sasithorn here is my site https://savorypiekitchen.com/