How to Say "non-professional" in Spanish
The Spanish word for “non-professional” is “amateur” — B1 level.

Examples
Él es un fotógrafo amateur muy talentoso.
He is a very talented amateur photographer.
Jugamos en una liga de fútbol amateur los domingos.
We play in an amateur soccer league on Sundays.
La película tiene un estilo amateur que la hace parecer muy real.
The movie has an amateur style that makes it seem very real.
A Word for Everyone
Unlike many Spanish adjectives, 'amateur' usually stays the same whether you are talking about a man or a woman (un actor amateur / una actriz amateur).
The Plural Trick
Because this is a borrowed word, people often say 'amateurs' for the plural, even though standard Spanish rules would usually add '-es'.
The 'Fan' Confusion
Mistake: “Using 'amateur' to mean you just like something.”
Correction: Use 'aficionado' if you are a fan of a team, but use 'amateur' if you are the one playing the sport without getting paid.
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