I've been cubing since Oct 2012 and my times are about 45-50. I practise most days although time is often limited by work and other commitments. Cubing's my way of settling the mind and unwinding stress

I'm also in my mid-40s.
So far this year I shaved a second or two off my PLLs thanks to Jskyler's excellent videos and a lot of idle PLL drilling while concentrating on other things. But F2L is where I'm slowest so that's what I practise most. I got it down to about 20 secs (excluding cross) by slow solving, blindfold, metronome, etc, but am stuck there and still seem to spend lots of time fumbling or frantically searching for pieces.
I guess I was expecting it would be quite easy to get sub-40 and then sub-30 would be a challenge.