It's quite easy to land on the deck,you just need to practice a few times and make sure that there is a sufficient headwind setup in the mission as well to help both take off and landing.....it can be done without the headwind but it is MUCH harder that way.
With regards to the landing, you just have to get into the habit of ignoring the fact that the deck suddenly drops (it's a CFS3 limitation as the code for carriers was never included, so the 2 LOD workaround was arrived at.....you can only have landing strips at the ground level in the game). I found the best technique was to approach on final aiming to land where the stern meets the water....yes it feels a bit odd coming in lower than the deck to begin with, but you soon get used to it.
I always found that landing on dry land aerodromes but landing across the strip was good practice for landing on the carrier.
HTH
Gandi