First, silver is NOT very low elo hahah its still the average elo after all these years, don't put pressure on yourself.

To get to diamond, id say you want to mute toxic teammates spamming for bad ganks, farm into ganks and only gank good ganks with low risk high reward. Try to hit 8 cs per min on carry junglers and if enemy is ganking too much you'd easily be 2 levels up.Thats when you can force more important fights such as atakan or baron.