I've had a few large "breaks" in my life. One involving when I decided "god" probably really didn't exist; until then, I was choosing to believe because the possibility seemed feasible, but eventually I reached a tipping point and decided it was more likely that there wasn't a singular guiding supernatural force to define everything. I just kept crunching numbers in life and eventually that happened. But it's funny how people work -- I remember having dreams (and I usually don't remember my dreams) of being abandoned in a house where I had lived with a loved one but now they were gone and I had no idea where they went, even if the old photos and belongings remained scattered through the house. The mind and subconscious personalizes it.
Another was when I chose to integrate my inner with my outer instead of putting on a charade, and deal with any fallout IRL because I was tired of feeling like a shadow person and saw value in being fully integrated rather than living under painful convenience. This also included being willing to disappoint, enrage, annoy, and/or distance myself from others depending on circumstance rather than always trying to appease everyone and appear blameless in life.
While this may not be true for most/many/some/other people, I clearly see how I don't participate in life events in the way I see some people doing. My experiences are incorporated, and they play a part in shaping me. I learn, or leave, an event or experience changed permanently.
This is in just a few years. I wonder how anyone can identify with the kid they used to be.
I still identify with my child self in terms of my core values and characteristics, and my inner life has had continuity, but it's more like my childhood me was far simpler due to a lack of life experience, and my "current me" has a huge tree-like expansion in every direction adding a lot more complexity around that core. SO I view it as less a "change" and more an "expansion."
But I do sometimes have visions of my current self parenting my younger self, the kind of self-absorbed, good-natured child who doesn't know what life is going to bring and doesn't understand some things about life yet, and thinking of what I would tell my younger self to keep myself on track and not be crushed by life as I almost was at various times.
All that being said, there were some RADICAL nuances added to my development throughout my life. Some of those were correcting ways (well, more like adjusting, they will never be "fixed" completely) in which I had been damaged (my viewpoint) by earlier life experiences, some were more flowerings of the seeds of the person I could become and I did grow in those ways.
That child was timid, and vulnerable, and too worried about pleasing people ("What if someone is disappointed in me? Or they think I'm a 'bad' person?") And everything was supposed to make sense. And be fair. Etc. The adult is far more battle-scarred and weathered and much wiser... and self-supportive rather than self-undermining.
Logically, free will is a ridiculous idea that people latch onto because it's emotionally satisfying to feel in complete control of your life; it's also a way to avoid thinking too much about situations that make us uncomfortable.
I don't know how to resolve free will issues. You're right, it's convenient to view all of one's decisions as "choices" but there's so much crap we just do because it's where we started, or it's the best we can do with a situation and our current knowledge/coping, and there's always choices programmed. I look at it like that -- it's like playing Zork with a language processor to take input, but it can only deal with what it's been programmed to deal with. Yeah, it feels like you can type anything into the field, but your choices are more limited than you realize. And the kinds of conclusions we reach have to be conclusions within our purvey, it's not really an unlimited range of choices and conclusions.