Outlook Email Reminder Automation

I need an automation setup that sends reminder emails to my clients using Microsoft Outlook.

Requirements:
- Reminders sent 5 days and 3 days prior to their appointments
- Emails should include 2 PDF attachments from my OneDrive
- Reminders should only be sent for appointments in a specific Outlook calendar category

Ideal Skills and Experience:
- Experience with Microsoft Outlook automation
- Familiarity with OneDrive integration
- Proficient in handling Outlook calendar categories and email attachments
- Knowledge of Power Automate or similar automation tools would be a plus