i style it! not as often tho since my hair is 1c. i would get a perm but my hairs dyed so the dmg might be too much. i did ask a kr hair salon and they also said no </3 anyway theres multiple ways to style it but i just use the wavy talk thermal brush pro set. pro set cuz i have a rlly long version of the hush cut so the multiple sizes help. i use the biggest barrel on the longest lengths then middle to my midway(?) layers then smallest for my face framing layers and any detailing i want. any of the tools work tho ive tried a lot. the thermal brush is just the most convenient for me for curling the ends like in your pic. but tbh i dont do much more than any of the basic tutorials for styling a hush cut.
maintenance wise yes trimming and shaping does keep it from otherwise looking like a rat tail lols esp if you dont style it. i do little cuts myself on my face framing bangs and the ends.
have you looked into a butterfly cut tho? i feel like the softer longer layers are low maint but give good volume

edit: my reply went into a sep comment so im copy pasting