Preschedule Time Blocks to better structure your weekly planning ahead of time

[Litceo]

Hi everyone,
This is something I am searching for a long time. I used to plan my week on paper and developed a workflow, that really helped me and some friends to get on top of our schedule.

Let me know your thought on that. I know this planning workflow does go against some of the GTD advice but for me (and some friends that also struggle with procrastination) this just works very well. It also helps me to be realistic on what i can even put on my schedule in a (for me at least) very natural way

How I used to Plan on Paper

When I used to plan my week on paper, first I'm writing down all the fixed appointments I have. For students this could be lectures, for any employee/worker this could be meetings for example. This can allready be done by a calender integration or by just by giving each of these appointments a task.

After this I would preplan timeslots for the time that is not occupied by any fixed appointment. I know i can focus about 45min at a time on an average tasks so I'm filling the empty spaces with predefined 45min time slots (that have a rough topic, for example learning, work, administration, cleaning, cooking and so on) , with appropriate breaks in between (with also some shorter timeslots for more demanding tasks). I only adjust this layout slightly from week to week. (As a student I only did major changes when the semester ends or starts)

With these preplanned timeslots I now get out my tasklist and fill up the available timeslots with the tasks i have to do. Some tasks will require multiple time slots. (And sometimes multiple smaller tasks fit into one timeslot but usually this is not the case for me) Those tasks with multiple timeslots could be split in subtasks but I usually find that more timeconsuming then it is actually helping me.

Then I usually tracked my time to see when and how much i did actually work on each tasks, so that I get a better feeling for the time needed to fullfill a tasks or when i get hung up on something.

My Proposal

What I imagine for this workflow is the possiblity to add thoses timeslots as some kind of "template tasks" to the schedule. Those can have a Name or description what should be done during this time, or even better are linked to a tag. With those in place you can click on them to fill them with a task. Here the tasks could be filtered by the tag this timeslot is linked to.
Ideally every tasks can be linked to multiple time slots and this could be displayed in the tasks itself (for example: Exercise Sheet 2 (1/3 scheduled timeslots done)). This can also be done by "timeslot" subtasks but those clutter the todo-list and take away the nice ability to directly get to the main task note or attachments.
As an additional nice to have, you can give each task an "estimated timeslots needed" number.

One additional thing: A history of the tasks mapped to a timeslot

Moving a tasks to another timeslot can have two reasons: 1. Things outside of your control changed and you replanned this task AHEAD of time or 2. you did not do the tasks in the timeslot you have specified, and thus have to rescedule it AFTERWARDS.
Having the original schedule including the properly replanned tasks to compare to the way you HAD to adapt your plan because you didn't follow through, helps to keep yourself acountable but also helps to see what planning did not work and how you may change this for the future. This is different to just time tracking what you are doing, since you also include the replanning when you are behind your schedule, which time tracking alone does not do.
So here a feature that let you reschedule in advance (a threshold how much in advance this should be could be usefull) and when the starting time of the task has allready arrived only let you replan with a "did not do" thomb in the missed timeslot would also be quite nice for this planning method

If there is interest I would be open to help with the implementation of some of the features, however this would be quite new for me as I am usually coding in other contexts with mostly C, Rust, Python and rarely some Java.
Let me know what you think, and if you allready know of a solution for any part of this system: any Tipp is welcomed.
Have a nice Week!