You could use a score and snap tile cutter or a wet saw with a diamond blade.
How to cut tile on shower wall.
Getting stuck and not having an answer well that s my biggest fear.
Periodically check the tile line with a level to be sure they are straight.
This tends to happen when homeowners need to cut a large hole in tile.
Use tile nippers or a hole saw designed for tile to cut curves.
Start at one end of the cut line and run the blade along the tile surface to the other end.
Use a tile cutter to just score the length of the tile and press firmly to cut.
Or you can use a 4 1 2 angle grinder with a tile blade.
Cut away large sections or large cutouts with a handheld circular saw equipped with a tile cutting stone blade.
Cut as needed with tile snips or a wet saw to allow tile pieces a better fit around shower faucets and shower heads.
Cut through the tile using an angle grinder.
Hold the saw up to your marked lines.
For exposed edges set edge trim or bullnose tile pieces in place.
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.
Use bullnose for exposed edges or you can use trim pieces.
Spray water onto the tile when needed to keep the surface wet.
Use spacers between the tile to make sure the gaps are consistent.
Push your tile firmly into place.
You can buy a 3 or 4 carbide hole saw but they are super expensive.