1.Open Minecraft: Java Edition on version corresponding to downloaded release or any variation of it.
2.Click on a button labeled Singleplayer.
3.If you have created any world before, click Create New World. If you have never created any world before go to step no. 4.
4.Click on a button labeled Data Packs.
5.Click on a button labeled Open Pack Folder.
6.Now you can see temporary folder created by the game. Open another instance of File Explorer and find the downloaded .zip file.
7.Drag the downloaded .zip file into temporary folder.
8.Click on Minecraft window and hover your mouse above the icon of the pack on the left side of the window, and click on the arrow pointing right.
9.Click on a button labeled Done.
10.Click on a button labeled Create New World.