Objectives and Key Results can be a bit of a mystery, but actually they're surprisingly simple to implement. And with a few pointers you can do it really well and succeed. Here are a few articles about OKRs to get you started.
How To Drive Action from your OKRs
How To Align Company OKRs to Team Work
What are Objectives and Key Results? (OKRs)
How to write good OKRs
Committed vs Aspirational Key Result types
Great OKR examples - some badly written ones too!
How to score your OKR progress
OKR planning - how to set your OKRs
OKR templates and spreadsheets