What are the optimal key and mouse bindings every beginner should have in CS2?

I see a lot of posts about running complex looking script commands to bind certain actions to certain keys / mouse buttons. I'm just looking for something that is probably best practice for all beginner players looking to get really familiar with a helpful layout - e.g. should smokes always be mapped to 'z', flashbangs always 'c' etc.

Any guidance from this community would be greatly appreciated! And if someone could help me understand how those complex command bindings work that would be even better. Thanks!