In order to figure it out, I felt that there were also some things I needed to change within myself. Essentially, I needed an attitude adjustment. The last 3-4 hours prior to this writing were spent trying to implement that adjustment, with limited success. (But hey, the point is to keep at it, right?)
A lot of what I read and researched strongly suggested focusing on achievements, not just past, but also for the future - going into your endeavors with a winning attitude. Makes sense, I suppose. And if you fail, then hey, it's not the end of the world. Learn from your mistake.
What if you are working on something you feel very strongly is not going to go well? Yet you work on it anyway, for whatever reason. There is nothing to build on from that, no lessons really to learn except that maybe you shouldn't have taken it on in the first place.
I suppose I can only keep hoping that it will go alright, and still put in my effort, which is admittedly a tad affected by these misgivings, but now that I know that I should not let that stop me. As for mistakes that should be learnt from this, well, I feel most of them weren't mine to begin with. I can only do so much with what I am given.