Big O

A have to say, while proofs had me feeling more confident in this course, that confidence was immediately crushed when we started to learn big oh. I have no idea what is going on. I'm doing my best to understand and keep up, but then with each lecture, I'm again struggling to stay afloat. When people help and explain it to me it makes sense, but when I try it on my own.... less success. Unfortunately, my plan for now is to just not give up with the hope that eventually the crucial missing link will click.