If you loved Mobile Suit Zeta Gundam - A New Translation II: Lovers, try Mobile Suit Gundam I
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Mobile Suit Zeta Gundam - A New Translation II: Lovers
→
Try this next

Mobile Suit Gundam I
What they share
Both films are directed by Yoshiyuki Tomino, and they both carry the outsider mood tag, and they sit in Action / Animation / Science Fiction territory. If that's the register that drew you to Mobile Suit Zeta Gundam - A New Translation II: Lovers, the second film will land in a comparable space — through a different lens.
outsider
What Mobile Suit Gundam I is
You wake aboard a space station in the UC 0079 era when Zeon declares war on the Federation. Then the colonies start falling. The film stops to watch a boy survive the first battle between humans and machines.