I went to Platty+, at the bottom end of Derwentwater, last April. We had virtually one 2 one tuition ( me and my 15 year old son) and it was excellent. there were only three boats involved, including John the instructor's.
Prices may have changed but we had an hour and a half's tuition ( more than enough to start with) and then about 3 hrs paddling ( hired the boat from the centre of course) and it only cost me £55.
In all honesty; it's the best £55 I've ever spent. The simple skills and the gentle, patient way they were taught, have proved invaluable over the past year.
Check their website for contact details, they really are
very good
hope you get sorted
cheers
Steve