I don't see anything actionable in "you have no free will" statement to care to deeply internalize it. Regardless of a flavor of "free will" interpretation.
It is a good idea anyway not to internalize such a fundamental idea based on comments by a random person on the internet, regardless of whether it is actionable or not.
It just appeared to me that this question is something that interests you, so I wanted to point you to a direction that I have found helpful.
The general process, which appears to be common to various approaches, is to practice specific kind of meditation long enough that you start to see your automatic reactions to the sub-consciously made decisions to slow down, so you are in a way creating room for something before the immediate reaction, and then you can verify the truth in what I describe by yourself. So there is no need to believe what I say or nothing directly actionable that I can transmit through this medium that would be helpful to you.
Few books I have found interesting on the subject:
Gallwey: Inner Game of Tennis, Ouspensky: In Search of the Miraculous, Nicoll: Psychological Commentaries on the Teaching of Gurdjieff and Ouspensky
