Normal
If reading fluently gave you the most trouble, Familia Romana would help with that. Fluency in reading comes from extended reading of text you understand. You can skip on the ancillaries, and just work through the main textbook. Although it's the textbook of the series, it's really more like an annotated reader but with a grammar explanation and exercises after each chapter (all in Latin). After that, or even alongside it, you can start De Bello Gallico, which is an abridged reader of the first, third, and fourth books of Caesar's Gallic War. Its margins are filled with notes in simple Latin explaining every unfamiliar vocabulary word (from FR) and grammatical construction. By the end of the course, you'll be able to read Cicero fine (there are selections in Sermones Romani, Roma Aeterna, and Catilina, progressively longer and less adapted), and I've never read Leibniz, but the Neo-Latin authors I have read were not troublesome.