Share 'Is it unrealistic of me to want to begin cycling program at 46?'

I started a few weeks ago and loved it but was only using a starter (crap) bike and got up to 16-20 miles per week, in 4 miles stints on bumpy, hilly terrain.  Now I'm nursing a 3-week-old neck and shoulder pain and not cycling at all.  So I realize that a bike fit for me with suspension etc would have been a better way to start, but really, if I buy a new, fitted mountain bike, which will really…