Getting stuck and not having an answer well that s my biggest fear.
How to cut tile on shower wall.
Or you can use a 4 1 2 angle grinder with a tile blade.
You could use a score and snap tile cutter or a wet saw with a diamond blade.
For exposed edges set edge trim or bullnose tile pieces in place.
You can buy a 3 or 4 carbide hole saw but they are super expensive.
Use spacers between the tile to make sure the gaps are consistent.
Hold the saw up to your marked lines.
Cut through the tile using an angle grinder.
If your shower pan is not level then the level line you created to mark the top of the first row will mean that some of your tiles need to be cut.
Set the depth of the blade to 1 4 inch.
Start at one end of the cut line and run the blade along the tile surface to the other end.
Cut as needed with tile snips or a wet saw to allow tile pieces a better fit around shower faucets and shower heads.
Once only the bottom row is remaining remove the support board.
This tends to happen when homeowners need to cut a large hole in tile.
Make multiple passes with the blade if needed to cut through the tile and to the subsurface.
Use tile nippers or a hole saw designed for tile to cut curves.
Spray water onto the tile when needed to keep the surface wet.
Periodically check the tile line with a level to be sure they are straight.
Use a tile cutter to just score the length of the tile and press firmly to cut.