I learned this verse in 2 days believe it or not.
How did I do it?
I wrote it out an old piece of paper and stuck it to the mirror in the bathroom. Then every time I went in there, even just to get a hairbrush, I would say it. So then every time After I knew it, I would still say it until it stuck. That is how I learned this verse! Good luck with your verse (metaphorically speaking).
"All Scripture is God-breathed and is useful for teaching, rebuking, correcting, and training in righteousness so that the servant of God may be fully equipped for every good work."
2 Timothy 3:16-17