I'm still a novice but maybe I can help you with a way to start. Talk a tuner into showing you how to tune. You might have to knock on some doors, so to speak, but I am sure there is someone out there that will spend 2 to 3 hours with you to show you the basics.

Then find a piano and practice unisons. You can find a piano at a piano store. Maybe one in the back that is destined for the heap. Talk to the owner and ask to practice on it a couple times a week. Spend about 2 to 3 hours each time. I used a chromatic tuner when I started which should be fine just to get something close to the correct pitch.

Buy a pair of earplugs. Amazon has the ETY ones.

Well, yes, kind of. The best way to learn tuning is to do it ... under the guidance and tutelage of a mentor.

Under the right circumstances, a good student can attain basic skills and experience after tuning perhaps as few as several dozen or maybe 50 pianos. We see this at the North Bennet Street School in Boston, where after one year the students pass the PTG tuning exam, demonstrating a basic proficiency in tuning.

For most others in a less than full-time schooling situation, the learning curve is slower and longer, probably in the order of way over a year and several hundred pianos. It takes that long for most (including myself) to acquire the skill and experience necessary to tune a piano acceptably good enough to begin charging money.

Sorry to put off anyone hoping to dabble a bit, but that is the plain truth.