Full Screen Mobile Menu: Help Please

I’ve been trying to format my mobile menu for weeks now and I can’t figure out how to get it to work. I want the hamburger button to remain on the bottom right of the screen at all times, click to open the full screen mobile menu, and click to close.

Please, if anyone has any insight, it will be very much appreciated!

Thank you!!

https://preview.webflow.com/preview/dana-bug-co?preview=3bfa3428b0363ec36235b5ea34fb6675