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