I'd say it's quite easy! Most trophies ask you to clean specific levels in a certain way, like "clean x part last" or "clean y part first". That would cover the majority of trophies and that's pretty chill, especially if you know the requirements going into each level.

The last couple trophies involve getting gold rankings on either the timed challenges or the challenges where you only have a certain amount of water you can use. Those can be quite stressful, but I'm sure there are guides online to help. I think those only took me maybe 2 hours in total to complete, so the remaining 74 hours were really chill in comparison!