Not quite. Pronouns in Spanish are more complicated than in English. You can use él and ella as objects preceded by prepositions, as in a ella. And, while in En

Not quite. Pronouns in Spanish are more complicated than in English. You can use él and ella as objects preceded by prepositions, as in a ella. And, while in English we make do with just subject and object pronouns, in Spanish there is a distinction between direct and indirect objects. So (since you asked) lo is for neuter or masculine direct objects, and la is for feminine direct objects. But for indirect objects, use le for him, her, or formal you. It’s tricky, at least for English speakers, because the indirect object comes up where you would least expect it. For example, I tell her in English includes the direct object, but in Spanish the equivalent is indirect.