Learn Spanish (Latin America): Aprender un nuevo idioma me resulta más desafiante que trabajar. - Learning a new language seems more challenging to me than working.

The verb resultar in this context acts as a subjective evaluator. While ser just states an objective fact, resultar connects the subject to an adjective based entirely on your personal experience. Here, me resulta expresses 'I find it to be' or 'it turns out to be for me'. While me parece (it seems to me) is very similar, me resulta strongly implies you have actually experienced the challenge of learning the language firsthand, not just guessed at it.

Why is it me resulta and not yo resulto?

In this specific structure, resultar works exactly like the verb gustar. The grammatical subject of the sentence is the activity itself: Aprender un nuevo idioma (Learning a new language). You are the person experiencing the effect of this activity, which is why the sentence uses the indirect object pronoun me. Literally translated, it is 'Learning a new language turns out to be more challenging to me.'

Why does the sentence use the infinitives aprender and trabajar instead of gerunds like aprendiendo?

In English, we often use the '-ing' form as a noun, like 'learning' or 'working'. In Spanish, when an action verb acts as a noun subject or a broad concept, you must use the infinitive form (aprender, trabajar). The Spanish gerund (aprendiendo) is strictly reserved for actions currently in progress, such as estoy aprendiendo (I am learning).