Put Menu/Socials under the Logo, and the Logo big and centered

Hi everyone. I’m just starting using this theme and so far I love it. I don’t know much abouth CSS, PHP etc, but I need a way to put the Header Logo quiet big in the center with the Menu and Social icons under the Logo…

Can anyone please tell me how to fix this? Can I put a code in the CSS Custom code area that can change this? If so, can anybody please provide me with it?

Thanks a lot!