I was going to write a post this morning about my first session with my new 32Kg kettlebell but you've beaten me to it
so I'll just respond here instead.
I started S&S in December last year with the 16 for get ups and the 24 for swings - mostly two handed. I'd just finished some rehab work on my shoulder which had been holding me back for the previous year which was very frustrating. I'm 41 and I weigh 76Kg.
Because I was wary of my shoulder I spent a week with just the 16 just to make sure it would hold up and then started adding in one set of get ups with the 24 as per the example progression in the book. Doing the get up with the 24 was a bit shaky at first and to be honest I had difficulty believing I could progress, but I stuck with the process. Once I felt confident with that set with the 24, which usually took about a week, I'd add another set in. By mid to late February I was doing all getups with the 24, and all swings sets were one handed with the 24. I had/have the problem where I'm wanting to test myself every session and get all my swings in under 5 min, but I'm learning that I'm better served having some days where I don't go so hard.
Feeling confident I ordered by 32Kg kettlebell (from Kettlebell fever in the UK), but they weren't available for a few weeks so I was stuck with the 24, even though I felt I could move on as I owned every one of my 5/5 getups and my swings felt crisp.
So all through March (which included a business trip) and the first half of April I had to stay with the 24 and not rush forward to the 32. It turns out this was really beneficial and is probably one of the best things that could have happened to me. Even though I wasn't progressing in weight, I was progressing in strength which meant when I came to use the 32 for the first time, which I did this morning, I was able to confidently add 1 set of get ups with the 32 into my session and one set of 10/10 swings with the 32.
On my first attempt I couldn't quite get up on to my elbow, but I came back down, made sure everything was tight (which it wasn't, which was the reason for the failure) and went again, this time making it. I'm really happy about that. I also love the way the 24 feels so small and light when you go back to it after just one rep with the 32.
So my advice I guess is that there's no rush. There's nothing wrong with sticking with the 24 for a week or two just to bed your strength in and make sure you're ready for the next step up. Once you do go up though, make sure EVERYTHING is tight. The 32 is a lot less forgiving than the 24. Also watch your grip so your calluses don't get torn, and maybe have a practice with the 32 outside (which is what I did) if your concerned you might damage your property. Once your confident with it go back indoors.
Sorry the post is so long but I just had to share because I'm quite excited!