Collect email adress with several input fields to one form

Hey everyone,

pretty simple: I want to collect the email address of visitors on several points on my website. I want all inputs to go to the same form. How do I do this? It only shows me different forms.

Here is the website: https://preview.webflow.com/preview/growgetters?utm_medium=preview_link&utm_source=designer&utm_content=growgetters&preview=99edec88df1ecd38a6850122c8529675&pageId=60a1379425438c9f3a81d3e7&workflow=preview

Many thanks!
Alex