so i have a print report function as follows:

def print_first_consult_report(self):
    return self.env.ref('my_model.action_my_report').report_action(self)

now I need to write a corn job to download this report and attach it to a binary field which I have 

@api.model
def download_and_attach_report(self):
    # Get all  timelines (you may want to filter this based on your requirements)
    timelines = self.search([])  # Adjust the domain as necessary

    for timeline in timelines:
            report = self.env.ref('my_model.action_my_report')
            if report._name == 'ir.actions.report':
                # Render the PDF for the specific record ID(s)
                pdf_content, _ = report._render_qweb_pdf([self.id])

                # If you need to save it as an attachment
                data_record = base64.b64encode(pdf_content)
                attachment = self.env['attachment.model'].create({
                    'name': "First consult",
                    'datas': data_record,
                    'type': 'binary',
                    'patient_attachment_timeline_id': self.id,
                    'mimetype': 'application/x-pdf'
                })

                # Attach it to the patient timeline
                self.patient_attachment_ids = [(4, attachment.id)]
            else:
                raise ValueError("The specified report action was not found or is not correctly defined.")

I tried the following approach by looking through other similar questions but I cant manage to do it can someone guide me on what to do