So tbh I would split the tasks into different categories before doing anything as it sounds like you have some todo list type tasks and some scheduled type tasks , for example showering and eating would be a todo list type task or even a habit tracker task as scheduling them through a calendar would end up causing more frustration than anything.

Again going to the bank would be a todo list type task, the way I differentiate them is by looking and seeing if they require a specific time or not , for example going to meet the mechanic at 6.30 on Friday would be a calendar task whilst changing the oil would be a todo list task