I know its been asked a million times but here is a million and one.  There are no scheduled ball fittings near me for the near future.  I'm an old dude and been playing for 2 years.  I've upgraded all my clubs to AP2s/ Vokey wedges/816 hybrids/ - an all Titleist set of clubs.  I'm even making good progress in lowering my handicap index.  Going nuts on what I want for a ball.  
I swing fairly slowly (71 years old) and still working on hitting the ball before I hit the earth.
Love Titleist (ergo the switch to all Titleist clubs) so I know one of the varieties of Titleist balls will work for me.  I still lose balls - although not as often as I used to.
Any hints or ideas?
Thanks