I’ve got a set of 16kg, 24kg & 32kg kettlebells & I’m working my way through the Simple & Sinister programme by Pavel Tsatsouline. Plenty of work/weight & literally designed as a minimum schedule to keep your fitness/strength up for your main sport. Couldn’t recommend it enough.
The book is on Amazon & well worth a read if you’re going to follow it. There’s a good outline here though https://amp.reddit.com/r/kettlebell/comments/1s29hc/pavels_new_simple_sinister_program_minimum/