Never bring the keeper out unless he can get to the ball before the attacker (lob ball) or at the same time as the attacker.
your just asking to be chipped (which is easy to do) and then it's an easy goal for them.
if you cannot get to the ball, pretend to bring your keeper out by making him come forward 5-10 yards then stop and let him go back, this makes a lot of players think your coming for them so they attempt a chip which your keeper then catches as he is running back.
as for defending it's a natural ability from practice and initiative and playing the game, it cannot really be taught. the only tip I can give you is go for defenders with at least 75 pace. the taller they are the better too. Kaboul is like 6'4 that is why he is so good with 78 pace.
defenders you want are kaboul, luiz, up kosc, ramos, pepe, miranda, chiellini, up benatia, boateng, santana, silva, etc.
also ideally you want 85+ pace full backs or full backs with medium attack rates so they don't venture forward as much, height also helps a lot.
if i had to choose between 2 defenders who look similar but one is 6'2 and the other 5'11, then it's the 6'2 guy every time.
same with keepers, the taller they are the better.
courtois, begovic, cech, sirigu, handanovic, adler
best defensive formations are wither 5 at the back or 4 at the back with 2 cdms. every formation has a weakness though and a counter formation, game skill is the most important aspect alongside having the best/right players for you and your playstyle.