i dont know why i am reading a lot of truss rod recommendations here, because that is the last thing you should be touching, and if you do touch it, only do quarter turns and wait ... do not turn it like you are turning a screw with a screw driver.
to lower the action you have to either sand the bridge or the nut, or well, both. i would not do that myself, i will only let a luthier do those things.
or well, you could always try using smaller gauged strings first, and see if it works out. "Acoustic strings" are usually big, which translates to higher action than normal