I also didn't do half-getups with the 32kg, and it was heavy for me.
What I felt like helped me quite a bit was static holds, in two different ways.
One way is simple overhead holds with either the 24kg or the 32kg. I would just press or push press the kb overhead and hold it for time. Also, I often march in place while doing this - kind of a loaded carry in place.
The other way is holding each position of the getup. If I was only able to do one getup with the 32kg, I would hold it for five seconds or so at each stopping point. So, hold in the lying, bench press position. Hold in the elbow position. Hold in the tall sit. Hold in the 3-point (not sure what to call it), where you're on one foot, one knee, and one hand. Hold in the kneeling position. Hold in the standing overhead position.
I would usually hold these positions only on the way up, then come back down at the normal speed.
I might do this with the one set I did with the 32kg, or for one or two sets with the 24kg.
I also would often do these holds on the last set of getups anyway. So, if I only used the 32kg for one set (say, the second set) and the 24kg for all other sets, I might do the holds for that set with the 32kg. But I may do the holds again on the last set with the 24kg.
Hope that all makes sense.