Hi
i recommend use the C-Lite workshop as starting guide. The manual is helpful with code too. Start learning the use of SED(script editor) and the WED.
small code using SED assuming there is a model named 'myplayer.mdl'
http://server.conitec.net/down/litec.zip
Code:
[/code]

function act_player();

function main()
{
   fps_max = 50;
// load your level
   level_load (NULL);
   wait(5);
 // load the (player entity, assign position, assign default function) 
   ent_create ("myplayer.mdl", vector(0,0,0), act_player);
}

function act_player()
{
  var speed = 5;
  var rotation_speed = 3;
  my.scale_x = .5;  // change model size if necesary
  my.scale_y = .5;
  my.scale_z = .5;

  player = my;
	
  while(1)      
  {
     //update camera position relative to the model position
     camera.x = player.x;
     camera.y = player.y;
     camera.z = player.z + 5; // 5 units above the model origin
     camera.pan = player.pan; // set camera same pan as model
     camera.tilt = player.tilt;

     move_mode = IGNORE_PASSABLE + USE_BOX;  
      
     if(key_w == 1)
     { 
       // perform movement
       c_move (my,vector(speed * time_step,0,0), nullvector, move_mode);
     }
     
     if(key_s == 1)
     {
        c_move (my,vector(-speed * time_step,0,0), nullvector,move_mode);
     }

     // perform rotation
     if(key_a == 1) { my.pan += rotation_speed * time_step; };
     
     if(key_d == 1) { my.pan -= rotation_speed * time_step; };
     
     if(key_q == 1) { my.tilt += 1; }

     if(key_z == 1) { my.tilt -= 1; }
    
     wait(1);
  }
}
[code]