I never learned how to shoot "art" without a tripod -- but that was the film days .....and generally under ASA 100. Looks like the light was not good enough. :-)
When it calls for f22 --it may require that tripod you carry along .......
f8, 260 mm (in 35 equivalent), ISO400, 1/125 in a lens with very good OS so plenty of light.
I've had few more at f11 and ISO800 with significantly improved DOF but the framing is off, I'll try to get some of those but doesn't look that promising.
Anyway what attracted me was the shapes and the color change of the water from the foreground to the background; detail and DOF was an afterthought and it shows.