I'm just trying to help

orgstuff.el

(defun tt-heading-description ()
  "Get header and description of first header element in buffer."
  (with-temp-buffer
    (insert "
* Top Heading
Some description
* Second Heading
Other description
")
    (let ((first-headline (seq-find (lambda (part) (eql (car part) 'headline)) (org-element-parse-buffer))))
      (let ((contents-begin (org-element-property :contents-begin first-headline))
            (contents-end (org-element-property :contents-end first-headline)))
        (list
         (org-element-property :raw-value first-headline)
         (buffer-substring contents-begin (- contents-end 1)))))))