Ok the thing is as I said before, kettlebells need to be taught by someone who has been trained to use them. With this I mean you can't just randomly get four kettlebells, look for 5 excercises and do them (apart from squats). Normally, trainees who "teach" kettlebell have gone through a period of learning how to perform the excercises correctly, you know like with a diploma and all that stuff. Also kettlebell will give you a hell of a strong core, but so will bodyweight excercises.
Also you can't add weight to a kettlebell, only buy a heavier one. With weights you can increase weight by even 0.25kg, so a bit more than 0.5lb.
And of course, you look more badass when using weights,

as many people think kettlebell is for girls/old people/whatever, which is definitely not true.
If I were you I'd do the advanced bodyweight routine from the link I posted before, and just get some big plates (10/20lb) so that you can add weight to a backpack and do the excercises weighted when you get better at them. I swim a lot and that's what I do, it does wonders
