Well first off, welcome to the complex world of planted tanks!
There's several different plants that can have a common name of microsword.
http://www.plantgeek.net/plantguide_viewer.php?id=144 Lilaeopsis brasiliensis
is true microsword. In order to successfully gro it, you'll need at least 2watts per gallon, although 2.5wpg is a better minimum, injected CO2
, and some kind of substrate fertilization.
Without enough light, the plants will either fail, or they'll grow very tall and leggy as they reach up towards the light source.
Flourish tabs are pretty decent, but I prefer to get homemade root tabs from the owner of plantgeek.net - though I have my own root tab kit now, and will soon make a batch, which I'll share instructions and photos on the process.
To plant, bury all of the white roots...only the green leaf blades need to be above the gravel. One easy way is to plant it deeper than necessary, then lightly pull up on the plant until it's just right...then tamp down the gravel around the base. But, do be ready to keep replanting a few floaters until they put down more solid roots.