You would want to make sure you have the right equipment see.
Whitewash tile floor diy.
How to whitewash an interior brick floor clean brick floor.
Pour about 1 4 cup of grout renew into a small plastic container.
Apply grout renew.
When you are whitewashing the floors you sand them in the same exact way you would sand floors for other stain colors.
Apply grout renew to grout lines.
To make the white wash i mixed 1 cup of white wash pickling with 5 cups of water in a large paint bucket and rolled it onto the floor.
Mixing cups rags paint brush a scraper like this or a piece of hard plastic for technique 2 and a candle for technique 3.
Clean brick floor with hot water and dish detergent or a few tablespoons of tsp mixed in warm water.
I used decoart americana outdoor living picket fence white paint which is non toxic water based and great.
Sanding the floors yourself vs hiring a professional.
Materials list amazon links.
You would sand the floors 3 times with finer and finer grits.