Hello,
1) Theme Options > Header builder > edit content of connection block, for example – https://prnt.sc/zltljl
Content of widget areas, you can change via Dashboard > Appearance > Widgets.
2) https://docs.woocommerce.com/document/stripe/ , for example – https://prnt.sc/zltv9j
Contact WooCommerce support to get further assistance.
3) Theme Options > Header builder > Mobile header content – https://prnt.sc/zlu28q
Also, watch these videos – https://www.youtube.com/watch?v=RbdKjQrFnO4&list=PLMqMSqDgPNmDu3kYqh-SAsfUqutW3ohlG
Regards