How to Find Diamonds

When I was new, I could never find diamonds properly. As I researched and researched, now I can find diamonds easily. I will tell you how I find it. First mine to Y Level 11 or 12. Then start branch mining, or try to find a cave. Branch-mining is when you mine straight and make branches both sides every 2 to 3 blocks. First, dig straight for 3 blocks. Then, mine left in a 1 to 2 block wide space, and continue mining in that direction. If you still cannot find diamonds in that branch, return to main path and make a branch on the other side. Then, in the main path, dig 3 to 4 blocks forward again, and make branches. Continue until you get the sufficient amount of diamonds(or any other ores). You can also find a mineshaft or a cave on Y 12 or 11 to get diamonds. If it was helpful, please comment! Thank you!