I have installed all the necessary parts for WPML for you, I will walk you through some of the basics.
#1. Header +footer translate:
Go to Elementor Header & Footer Builder
Select the templates circled in red (header 6, Footer bar, Footer 1) and select the language in the upper admin menu bar to edit your language: https://prnt.sc/1ttuez6
#2. Translate text on theme + plugin :
Please go to page String translation, search your text and add translate for all languages: https://prnt.sc/1ttuqmz
#3. Menu: I have synchronized the menu for you, but you have to translate the text in this menu to be more accurate.
Let me know if you need to help.