Hi
i'm trying to create a system for our company and did some googling but nothing really comes up that can do the trick for me or seem to be working.
Ok our plan is to create a Library with all possible contracts from each department in. Id be working with folders to fix all permissions so they wont see eachothers contracts. Eventually work with a view that doesnt show folders but just the documents.
Example as below;
Pretty basic information so far;

Every contract that will be inserted will have a specific expire date ("Vervaldatum" on my screenshot).
I want to be able to send out reminders before, for example 90 days, 60, 30, 7 and final day it will expire. (I did not manage to get this working btw 😥)
On TOP of those reminders, if possible, I would like to add a colum so the person uploading the contract can set an extra reminder to be send out (For example: add a column 'Remind me in' and the value would be 200 -> the system would remind the person 200 days before the expiry date by email)
I'm really new to Power Automate and I don't always understand the actions its doing or how its build to fully understand each step. If there is a detailed guide out there and you can share it with me, appreciated!