Don’t be afraid to add more classes.

You won’t run out of paper.

Each class should have its own responsibility. Don’t have one class that calculates shipping and sends orders to the warehouse and emails the customer. Let the class have one job.

You won’t run out of disk space if you add more classes. Electrons are cheap.

Learning how to break up classes is an advanced skill. If you master this skill, your services will be in more demand.