What does a dotted minim/half note =c.60 mean? What does the c mean? And how much BPM is this?
The writer has designated the dotted minim as the 'beat', and said that there will be about 60 of them in a minute. This makes each bar last just one second. It's not easy to time bars in that way, but setting a metronome at 60bpm will help you play each first note of each bar on a click.
If you wanted a click on each crotchet, then set the metronome for a pretty quick 180bpm, and play the left hand part along to that. A student of mine would say 'el-e-phant' for each bar. and keep time to that.