Runs and wickets
An illustrative score of 84/2 means 84 runs with two wickets lost. This is a teaching example, not a live match.
Overs are not decimals
12.3 overs means 12 completed overs and three valid balls of the next over. It is not 12.3 in decimal arithmetic. An over comprises six valid balls.
Keep the context
A score alone cannot tell you the result. Check which innings is underway, the target if any, and the match format.
Practice
Pause a scorecard and explain each field in your own words. Separate team totals, individual figures and extras.
Official reference
https://lawsofcricket.lords.org/laws-of-cricket/the-over-scoring-runs-dead-ball-and-extras/the-over