Sadly it's one of those things that you just have to feel for yourself, right? You can't explain it to someone in a way that they'll understand and be able to apply instantly. Esp since it takes conscious effort to be performing "no effort"
I don't think this can be felt instantly after an explanation, but my personal experience has been that I gradually learned to feel this way through a regular mindfulness meditation practice. I used the Waking Up app for the past few years and it really changed me.
If you can “convince yourself” (ie. actually feel), that this moment right now is the most meaningful moment of your life
And you can do that consistently, in the moment
You are there
And the weird thing is that to get there, we need to let go, not do more or make an effort, but relax into it