Well, I can tell you that English was the second of four foreign languages my dad learned as an adult. His native language is Hungarian, and he learned German, English, and French, in that order. He always said that English was the easiest.
If we’re going to cross anecdata, my uncle JM spoke Spanish, Basque (four dialects), English, Swedish, Norwegian, Finnish, French and Italian. He claimed English was the hardest.
You’re quite right. No gender at all, in fact, even less than English—the 3rd-person singular pronoun u does for he, she, and it alike. The grammar is simple and easy to learn for a beginner. It’s clearly Indo-European, and the conjugation will have recognizable similarity with European verb structures, only much simpler.
The funny thing about Persian,* though, is how it’s deceptively simple and easy. There are infinite depths of hidden subtleties than can only be learned through long acquaintance. It’s one of the very easiest languages to learn for beginners—for purposes of conversation and general utility. It’s one of the hardest to learn vis-à-vis the finer points of belles lettres, and the real difficulties are not at all apparent. As I learned when translating Persian poetry.
*Please don’t call it Farsi. Its native speakers themselves call it Persian when speaking English, and they get irritated when Americans insist on changing the name, a hyperforeignism.