How to find actual yield?

I'm curious about how to calculate the actual yield on my cryptocurrency investments. Can you walk me through the process? I've heard about different metrics like APY and ROI, but I'm not sure which one truly reflects the actual yield I'm earning. Is there a specific formula or tool I should use to get an accurate picture of my investment's performance? I'm also interested in understanding how fees and taxes might impact the final yield. Could you explain how those factors are factored into the calculation?