Learning Latin is just learning huge lists of word endings. For example nouns have 5 (or so) cases, and three genders, and five (or so) declensions, and singular and plural, so you're almost into the hundreds of word endings just for nouns, not counting irregulars. And you basically have to memorize which word goes in which declension and such, though there are some patterns you can use to help you. But if you actually learn all that crap, it does make some things nice and easy. "Dog bites man" and "Man bites dog" mean opposite things in English, but in Latin you'd know which one was doing the biting just by the word ending, and you could mix the words up in any order and still know what it means.

Latin is extremely useful to learn, if only to better understand English. And if you ever want to learn Spanish or French or German, Latin will almost get you halfway there.