Salve fratres! This is one of my first posts, so hello all. Personally, I think one of the best textbooks out there is the original: Donatus' Ars Minor, it's what I used. An English or bilingual copy isn't easy to find so I do, therefore, second Wheelock as a possible alternative. If you happen to be (like myself) a student currently in college your institution might offer it. And those of us on here can always help you with declensions, sentence structure, and so on. Rome wasn't built in a day, but, as Augustus said, it was left made of marble in the end. Your language skills will eventually have the same result, it just takes time and method.