Hi.,
Thank you for purchasing our theme and contacting us.
For Menu go to Dashboard > Appearance > Menus > Here you can select the menu and edit the menu as per your needs.
For site Logo:
Go to Dashboard > Appearance > customize > Site identity > here you can remove and uplaod your logo.
Then, Go to Dashboard > Headers > Header (default header)> Here you can replace your logo in logo module, here you can select the logo type as Logo, Custom Image, Title, Title and Description.
If yopu need you can select the Custom Image as Logo Type and upload you own logo.
If you have any queries, found any difficulties, please feel free to contact us. We are always ready to help you.