Redoing a tile shower can be a fairly simple process.
The first step is to protect the finishes and fixtures that you’re not looking to remove. Once they’ve been covered with cardboard or plywood, then go to town with a big sledgehammer!
Next, remove all the tile and backer board down to the studs. Always remove the existing backer board that the tile was initially bonded to, because if the board chips or gets damaged, it deteriorates and isn’t worth saving.
The last step is to install new backer board, waterproofing, and then the tile of your choice. This is also a great time to create any additional features, such as a recess soap niche in the shower wall.