Customize prestashop theme

I have prestashop e-commerce website . website name is (tomega.me)
i wanna Customize the header to be same like this website (niceonesa.com). with main menu in desktop and mobile mode for sure . please tell me the cost for my order and time .

please see the screen recorder video https://streamable.com/7momyi
and attachments and confirm the cost and time to me before make the payment to you .

thanks