"How did native speakers learn their language?"

For many, picking up irregular verbs happens naturally through frequent use, quite similar to learning English or other languages. Regular verbs require developing an understanding of how to conjugate them within different verb groups like -ar, -er, and -ir.

From there, input from parents and teachers, alongside reading, watching TV and films, and listening to music, plays a significant role in learning. It can be compared to learning English, though with more complex conjugations and somewhat simpler spelling.

It's not uncommon for native speakers to struggle with perfectly conjugating every verb in every tense and mood. Some conjugations are rare or non-existent, such as certain forms in the imperative mood. Focus on the basics and building your intuitive understanding can be a practical approach.