One of my favorite tactics in FIFA 16 is not even from FIFA, it's from CS:GO .
So basically, rush the goal at the whistle Trust me, with the right passes and some speed control, I've managed to score quite a few times in the initial few minutes of the game. If you're not too confident, just maintain possession till atleast a couple of your teammates show up. Make sure that your forwards are accurate though!
I can't really say much about FIFA 16 as I only occasionally play it at my friend's house and even then I play very casually so my best advise would be to just relax while you play this game. FIFA is an amazing game to just chill back and have some fun without being too serious, at least that is the way I play it
Also I agree with zombgamer , foot fake can be very effective