First time installing tile

If it makes you feel better, Floor & Decor sells a high quality thinset that cures overnight that goes on top of anything (after you scrape up the thinset leftovers you have now)

Scrape it good, then clean it good to get all the bits of thin set up.

Then measure the room so you can find where to start your tiles and pop a couple lines like the crosshairs in a rifle scope and start in the middle of the room laying the tiles. Let that set overnight and do the cutting, fitting and installing of the edge tiles the next day.

Then wait a day and do all the grouting to finish off the floor. Then come back and install the shoe moulding around the room that you removed. Total time should be no more than a days worth of work, but spread out over at least 3 days due to letting things set overnight.


Edited: When you measure the room the objective is to find a starting point that will have even tiles around the edges of the room that are the ones that need to be cut to fit. You don't want one side of the room with 10 inches of tile next to the wall and only 2 inches on the opposite wall.

Also, when measuring keep in mind the spacing between tiles in the equation. With such a small room you can get your rough starting point and lay some tiles dry with the spacers to see how they will fall as far as size of the border.

I would do my best to start with a full tile going through the doorway into the washroom and let the back wall fall where it may since it will be under the machines according to your pic in the OP.

Angle grinder with a diamond cup works really well. Invest in the dust shield that attaches to your shop vac. I lightly misted the floor as I went to keep the dust down. Ugly job any way you look at it.