Move form button into header and replicate button

Site URL: https://www.crossfitulysses.co.uk/health-and-fitness-challenge

My 1st use of the forum so apoligies if its inthe wrong format

I found code to hide my banner (got that working)

1st- I would like to see if i can move my form button into the header

2nd- Its our only call to action button on that landing page, can i replicate it?

https://www.crossfitulysses.co.uk/health-and-fitness-challenge

1st- I would like to see if i can move my form button into the header

Clicking header button, and show form? or?

I would like to move the button and when pressed it enables the form 

Is this then replicate-able  or do i need separate forms? 

4 hours ago, crossfitulysses said:

I would like to move the button and when pressed it enables the form 

Is this then replicate-able  or do i need separate forms? 

You can use plugin in this guide.

In my guide, I create a new page. However, in this case, no need to create new page. 

You can read instructions.html file in plugin folder, you will see how they reused the form on that page.