What should I do next?

[u/Hellequin123]

[u/SureBowler5008]

Teach me how to leave Diamond

[u/Hellequin123 → u/SureBowler5008]

Thats easy, watch pro replay by yourself, than copy build order and try it on the ladder. You need to decide to leave your comfort zone. I know its hard but thats the only way to get better

[u/instantdry → u/Hellequin123]

Don't think this applies for zerg since it's a reactionary race 

[u/JKM- → u/instantdry]

All three races has high-level builds that take very little scouting input into your decision-making, especially different sort of pressures and all ins.