You welcome 
Your mission “separate” into five groups:
-
Logo in white (inside the overlay put the logo with same size/position) (This is for seperate Q)
-
Full width/height overlay background (by position absolute & z-index or by 100vh)
Full screen Navigation Menu
Fullscreen navbar layer - #2 by shlomit -
Hamburger white + enlarge
Navbar menu button | Webflow University
see about z-index
Help creating full-screen mobile nav -
Big links + center
(No tutorial this is by simple CSS - play with margins/font size and so on)
Navbar | Webflow University -
“lets talk” button + round corners
https://university.webflow.com/article/border-radius
Look/learn from the structure of pro templates:
-or- workshops
https://webflow.com/workshops-archive
Try this (use the links i added) than add “read only link” + relate Q