Double tap shoot to to a low shot under the keeper, works really well! Also the chip shot can be deadly, especially if u time it just as the keeper is about the goto ground to grab the ball!
Also using the right stick to push the ball away from the keeper usually gets u through on goal or a penalty!
If going for power make sure to angle the player towards the opposite corner of the goal, and u get more power if u sprint before u shoot, when u press sprint the ball will get pushed forward, time the shot just as ur players foot is coming back towards the ball, about 2 and a half/3 bars of power and it will blast into the opposite corner!
And just as a tip, the easy skill moves are super effective, fake shot(press shoot then pass) and the fakes(depending on where ur player is facing, if running --> then u flick the right stick up to do a fake to the left, or down to the right) these 2 skill moves when used right can make a lot of space! And they are easy to slowly place in ur game, try and practice in the arena, set up a practice game, with 1 on 1 or with defenders and try some skill moves or shots!
Another easy 1 is flicking the right stick backwards then forwards, flicks the ball forward with the back foot!
Just a small edit about the power shot, by opposite corner I meant compared to the footedness of the player, so right footed try and sprint so ur shooting into the left corner across the keeper!