Need help with Movement

I’m trying to make a game, but in the game, i need smooth movement. So i need the character to rotate with the presses of the left or right key, and then when the forward button is pushed, i need it to go forward towards the rotation, not up. I haven’t even got a clue, but i’ve been staring at my screen for a while now, and help would be extremely greatly appreciated.

                                                        Thanks, Gura