Here are some examples of how to use "luchando" in a sentence:
* Estoy luchando con este problema. (I am struggling with this problem.)
* Está luchando por encontrar trabajo. (He is struggling to find work.)
* Ella está luchando contra la enfermedad. (She is fighting against the disease.)
Other options:
* Tener dificultades: This translates to "having difficulties" and is a more formal way of saying "struggling".
* Batallar: This means "to fight" or "to struggle" and is used in a similar way to "luchar".
* Pasarlo mal: This literally means "to have a bad time" and is a more colloquial way of saying "struggling".
The best translation will depend on the context and the specific nuance you want to convey.