TTC with Fiance's Issues

My fiance & I are looking for advice on how to get pregnant. He's using Androgel for Hypogonadism, which was diagnosed last year. Things have improved since then, but he doesn't always come. I'm almost 25 & he's 49 so we want a baby ASAP, due to his age. I've started using Preseed & Pregnitude. Advice??