Once your form is ready to embed and you have your AMP page setup you can follow the following steps to embed your form. Currently, AMPs requirements to use a custom 'amp-iframe' element mean it only works with the fallback iframe embed method.
Embedding your form
<script
async
custom-element="amp-iframe"
src="https://cdn.ampproject.org/v0/amp-iframe-0.1.js"
></script>
<amp-iframe
width="1000"
height="1000"
sandbox="allow-scripts allow-same-origin"
layout="responsive"
frameborder="0"
src="FORM_URL/embed=1&inline=1"
>
</amp-iframe>