Letting go and going with the flow is very hard... it's ultimately trusting isn't it?
In my case, I was taking golf lessons and it just seemed I wasn't improving.
Then I got the ultimate kick in the butt, I was playing a resort course, Silvertip.
The course is complex and difficult. It never dawned on me when the lady of the couple I was playing with asked if I was a scratch golfer at the turn I was playing well. I just went on playing and, later at the hotel, I entered my score card into the handicap system I found I had shot my first round ever in the 70's. So, not paying attention to the score, let me just play the game and when I just played the shot in front of me, hole by hole and focused on the target - I did something I had wanted to do my whole life.
The progress I thought I saw, wasn't the progress I was making. When my mind just focused on the next shot, the total result was what I wanted. I followed that path all the way to my other goal, a single digit Handicap.
That paired with something else. The sports psychologist said "You have to believe you are good before you can be good." Pretty opposite of what we are told. So I kept a notebook, and wrote positive statements in it like "I am a very good putter." and with reading it every time I practised, I became a very good putter.
So I have 3 pages of POSITIVE statements of what I wanted in my golf game in my golf notebook.
In a different one - I have positive statements of what I want in my life. They are not all true yet, but how I see myself has changed. I accept change. I can take on new therapy. Even when it does not look like it - progress is being made. I am not what happened to me, I am what I chose to become.

It seems the opposite of how we are told things work, but when what we were taught doesn't work....right?