I have seen YouTubers who say, “Don’t copy Maru. Maru is a god level player.” These vloggers are saying that Maru is a pro and what he does is beyond the average player.
Basically, what Pro Zerg players stick to the basics and do it very well. If any.
Serral, Reynor, Rogue and Dark are God-Tier Zerg IMO. If you are knowledgeable enough, which I am not, you should be fine catching up with them.
For starters I would recommend learning some youtubers or content creators. Lowko @ youtube is a good example. As well as Winter.