OK...Let's give it one more try...
The relationship between Qadr and free will explained as easy as possible as far as I have understood from Abdullah and Risinglights explanations:
There are two types of qadr:
nr1 existed 50.000 years before all creation already, contains everything that a person will do, say, get in his/her whole lifetime until the smallest detail...nothing will be skipped and nothing can be changed no matter how much dua one makes.
nr2 a yearly list of what you may get or achieve depending on your decision making, effort, dua etc.now let us pretend Qadr nr1 does not exist. only nr2 with a yearly list with potential opportunities etc.the
list for 2020:
-------------------------------------------------------------------------
you will get a job at Apple as a salesmanager if you take 100 hours of preparation time for your job application and make dua every day.
otherwise you will work at mc Donalds behind the counter if you take 50 hours of preparation time and make dua once a week.
any less, you will not have a job at all for 2020.
you will not get married in 2020.
...
-------------------------------------------------------------------------
So, now it is up to you what you make of the year 2020. depending on your effort, dua amount of ibadah, how you live your life, you will work at Apple, MC Donalds or not work at all.and you will not marry in 2020 no matter how much dua you make...maybe 2021.etc.
you have full control of your free will...and nothing is affecting it. of course shaytaan is trying to influence it and the worldly conditions you live in have some effect, but it is fully up to you what you decide at those situations.
Parallel to that, everything you do is written down in a book with a red cover with the greatest detail.and then 2021, 2022, and the years after that the same...until the day you die.
when you die, the book with red cover will be closed and the title is written on it "Amnasheiks Qadr nr1"...put in a time machine and send back in time 50.000 years before all creation.
now lets go back to the year 2020
your opportunities for 2020 listed in qadr nr2 remain the same...you still have full control of your free will.
somewhere there is this book Qadr nr1 with red cover but that doesn't affect your free will in any way...but if you would open it and read the page of today, you would read exactly that what you just did or decided...because it is the book from the future.
So everything is exactly the same...you would make the same decision, the same effort everything the same.
that is the relationship between free will and the two types of qadr.of course the reality is much more complex...and maybe not everything is exactly the way I described...but in laymen language, something like this.