I've just completed the 10k swing challenge and loved it. The simple programming was attractive, I got noticeably stronger by the end. I'm a tree surgeon and work feels a whole lot easier on my body, that's my measure. Could you please suggest other programs that I could try? I would like to increase strength specifically. For reference I only have one 24kg hard style bell available to me.
I'm going to suggest the OP take a look at S&S as opposed to ROP for these reasons:
ROP from ETK is a great program, but I wanted to point out that, in the book, Pavel suggests running through the "Program Minimum" before starting ROP. This is mainly to get the beginning practitioner's shoulders in shape to handle the amount of pressing and snatching that is in ROP. Since S&S is the updated, and more thought out "Program Minimum", it may make more sense just to start off with S&S.
If you never cleaned, pressed, or snatched a kettlebell; a 24kg might not be the easiest to learn technique with.
You already know how to swing, then for S&S, you just need to learn the TGU. Starting off with 24kg for TGU could prove difficult, but luckily, the TGU can be learned with little or no weight, and be progressed with anything weighted you can hold in one hand (milk jug, dumbbell, etc).
I did the 10K challenge back in October of 2018. I think the 10K challenge supercharged me, because right after I finished, I jumped right into S&S 6 days a week and progressed rather quickly. Think about it, if you were doing 500 swings a day, 5 days a week; 100 swings a day for 6 days a week wasn't anything. Being fairly strong in the swings, I was able to focus on practicing the TGU. (BTW: I as able to go from hitting timed standard with 32kg to 40kg in a few months, and had progressed to using 48kg in a few months after that.) I credit a lot of my progress in S&S to the 10K program for increasing my thermostat physically, but more importantly, mentally.
Having only one 24kg could prove challenging for any program, but I think you could progress each exercise in the following manner:
Swing: 2-hand swing w/24kg > 1-hand swing w/24kg > Increase density (less rest) > Increase volume
TGU: Naked (no weight) > balancing shoe > light weights (dumbbells, etc) > 24kg bell
Good Luck in whatever you decide.