I'm 62 years old now, had my PPL since I was 18, currently have about 1200 hrs tt.
I just recently (took the FOI test in June) started working on my CFI-S rating. The sport pilot instructor rating doesn't require a commercial or instrument rating.
I got the" CFI bug" when I started flying with a young lady that literally fell in love with flying when I took her for her first airplane ride 4 years ago, her Junior year in HS. My wife had this girl in her 4 yo pre-k class in school, then taught her brother in her 4th grade class.
I started "teaching" her, in my C-150, the way I was taught. I found I really enjoyed it. I don't need the money, and most instructors don't want to teach for free. She has about 40 hrs. left seat time in the 150. She can do the basic SP flight maneuvers, take off and land, and does a great job with the 150. My brother & I just recently bought a Rans S6S. My "girl" flew it for the first time last Wednesday and did a fantastic job flying it doing the same maneuvers, including take offs and landings. She learned what adverse yaw is, lol. She & I both know she'll be limited with the SP rating, but she'll at least get to fly. When she gets out of college, she can go on to get her PPL.
I'm taking the SIA written nest Tuesday (the 8th).
Kathryn isn't the only reason I'm doing the instructor "thing", but certainly the inspiration for it. My 31 yo daughter is a corp. pilot, CFI, CFII, she's taking her ATP checkride next week. She Doesn't want to instruct, and is GREEN with envy that I'm flying with Kathryn. I've found that a lot of instructors want to teach the world to fly. They get a few students, get a couple/few hours with them then abandon them. I won't do that.