You also might want to check out this thread:
I would advise to play a ton of custom games vs. M3 protoss players to solidify your macro. Get control groups to check your tech (lurker timing, allin defense, lategame bl / infestor, gas timings and general macro like injects & macro hatches in case of ling opener or roach /hydra and creep spread / extra queens.
Just think that your macro is trash and you can do 2-3 times better after like 10-20 games (mainly drone-timing and upgrades / tech timings).
As someone already wrote: I’d also advise to go for an early overlord speed (before or after ling speed) and if you’re good enough to scout without it, you can cut corners but that will probably be rather in m2 and not in d1 or m3, I’d say.
Feel free to provide some replays - I’m sure this will not only help you (feedback) but also other players (learn something).