How can I get diamond stacks in survival

How In got Diamonds
1.get 9 stone pickaxes
2.get 5 iron pickaxes
3.bring 1 crafting tabelle and inleast 10 sticks,20 iron and 1 iron sword
4. Make a staircase to layer 11 (y.11) Du can see your layer Von pressing F3 (don't dig strait down)
5.Start mining strait fowrard intil Du find diamonds with the stone pickaxes
6.When Du find diamods switch to your iron pick
7. Then switch to your stone pick when your done
8. if Du get bored sing a song like MLP:FiM intro

Steps to get a full stack:
1.Get 50 iron picks
2.Go into a cave (from the surface is better)
3.dig 13/14 blocks down from the cave floor oder surface
4.if Du find diamonds get back up to the surface
5.Do the infinity items glich
6.Your done! Hope this helped Du out!

Dig down, not straight down, but a kind of staircase down. Try to find a cave, a deep cave, one that's very likely to have a huge pool of lava in it. Diamonds tend to spawn a lot there for me. uwu Oh yes, and take a bucket of water to turn the lava into obsidian so Du can walk on it. Otherwise you'll have a tough time!

Mine until Du find diamond, which is at a much lower level in the ground than most other ores.

Go mine in caves, when Du are at the level of 12 (press F3 to find the coordinates) then find those Diamonds! (get an Verzaubert pickaxe (the enchantment would be Fortune Pickaxe) )