I am no doctor so take below with a grain of salt:
The ECG signal has a number of marking points that are given letter symbols.
The time between those points (intervals) are measured in milliseconds.
Your heart rate (HR) is 54 beats per minute (normal)
Your P-wave is 108ms, which is normal.
Your PR interval is 153ms. (normal is 120-200ms)
Your QRS is 91ms. (normal is 60-100ms)
Your QT interval is 410ms (200-440ms)
P/QRS/T axis seems fine too
RV5/SV1 is the maximum amplitude of R wave of one selected dominant beat from lead V5 / the maximum amplitude of S wave of one selected dominant beat from lead V1. Your sum value is 1,171mV which is a bit lower than normal (1,6-3,2mV) but probably just fine.