i got sober when i was 51, so yeah to sober fifties (i'll be sixty in a few weeks)
keep imagining, FTG, fill in the details. it's great you're doing it; some people just draw blanks and i think that makes it harder. when there's nothing positive coming to mind.
and i'm mindful there's a difference between imagining so i can put plans in place to make it happen vs a dream-fantasy of how perfect and wonderful it will all be.