QUOTE
sooooo if a dotted crochet is half a bar, and 84, then does that mean 84 is 2 per bar or every 3rd quaver? Or have I lost the plot totally? and if it is how do I set it to beat every quaver and get the same speed? (no I'm not gonna expect to be able to play at that speed, yet, but want to see where to aim for)
oer that lot looks a little complicated, sorry
No, not at all.
Yes, dotted crotcher 84 is two per bar, or one every third quaver.
You 'd like to see where to aim for - that's ok, multiply your 84 by 3 and that should give you your quaver speed. Warning - it will feel uncomfortably fast, and your teacher may not expect it to be up to final speed after only a few days.
You might like to set yourself a quaver speed of around 140 - 150 to start with, as a practising speed for the first day or two, then gradually build up a bit.