As an over-50 instructor I must say that things do take a bit longer to learn now than when I was a teenager. I do notice that many of my older students often need a couple more attempts before things are exactly right - but on the other hand, most of them have pretty high standards so may push themselves that little bit extra. I have had a couple of very young students lately who have indeed breezed through their ppls much more quickly than the average but they are used to an intensive learning environment so I guess their brains are in gear for it. However - some of my most proficient students in the past have been "older" ones - one who started when over sixty and another in her late fifties. The main factor seems to be whether you are prepared to give the time and energy to complete your studies. You sound like you're going to do it so choose your school/instructor carefully and have a fab time ! I look forward to sharing the airspace with you when you're done.