Aiming for sub 19 30. Trying tomorrow wish me luck

Everyone make a post of your most recent run no matter how bad, slow, embarrassing just take the action. Ill start:

I wanna run a sub 19 minute 5km currently I have a 19 57 pb without a lot structured training. Started increasing my distance and am doing about 35 to 40 km per week any advice on how my runs should be structured?

PB: 21:09, can't break 21 mins, how could I even think about breaking 20 mins?