It was a learning curve.

Meaning

The experience involved a process of learning and development.

Examples

• John: 'Learning this new software was tough at first.'
• Alice: 'Yes, <b>it was a learning curve</b> for everyone.'
• John: 'It often is, <b>it was a learning curve</b> for me too.'
• Alice: 'Adapting to a new job role was challenging.'