How we see our sights is utterly personal (I say this after testing eight sights sets on a now long-gone G20).
I found what works for by testing. (FWIW, I continue testing to keep up with my ever-diminishing eyesight).
Yes it can be expensive.
No there's no real easy way.
Perhaps your shooting community can offer you an opportunity to try other folk's guns, asnd see if any sight combinations on those help you learn what works for you.
I always suggest something readily visible out front, with an unconventionally wide rear notch.
'Course, I'm old, and been wearing specs for over 50 years.....
"all my ammo is mostly retired factory ammo"