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.
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