Bad idea to develop another home brew
For the money that you'll spend in time, software and learning, it's such a false economy that I'm surprised that people still consider it.
Think about it.
How long would it take to develop something even basic to run your helpdesk? Even a simple product would take months. How much is your time worth?
You can buy helpdesk software that has years of product development and real-world testing, ideas and support for a few thousand dollars. With such a rich field, why would anyone even contemplate re-inventing the wheel...again...
Best regards,
Rod