The first step is to cut the mango to get the seed
This is an extra step. So you can eat the fruit. Also don't cut all the way through. Just don't cut the skin, only the fruit part.
Almost the seed (the middle piece)
Now with the middle piece, cut away any fruit that is on the seed. Also run it under warm water to get any fruit off it. The seed is the hard thing.
When I was rinsing the seed the slit was already open. Other seeds may not. So gently find a way to open it.
Inside this slit is the seed
The seed and what it came out of.
Rinse the seed in cool water.
Wrap the seed in the wet paper towel and put it in the plastic bag
Now find a window that gets a lot of sun inside your house and tape it on the window or place it on the ledge of the window or if you have a table by a window put it there. Just make sure it gets sun
Now wait and watch it grow. Also make sure the towel is always wet.
I will make another guide when my seed hopefully grows its roots and stem. Until then have fun growing.