Ok. I’m a little closer using this code. Still need to be able to create new posts (and/or custom posts?), but at least I solved one of the problems.
<?php
$fields = get_field_objects();
$fieldGroup;
foreach ($fields as $field) {
$fieldGroup = $field['field_group'];
}
$options = array(
'post_id' => 'new_post',
// field groups has to be an array even though it's just one int...
'field_groups' => array($fieldGroup),
'submit_value' => 'Start a request',
);
acf_form($options);
?>