Never too late to start. Just probably need more time to learn. Anyway, the fun is worth it!
You mean you don't wanna learn to read music notations? Can.....just learn some accompaniment styles (no melody, coz suppose to play as people sing), play by ear (with melody) or play by memory (with melody).
However, music is a language. Reading and writing music notations would help you a lot, as quite a lot of music materials are in music notations. That's how musicians communicate musical ideas if they don't play it out.
In Barbara English Maris' book titled "Making Music at the Piano: Learning Strategies for Adult Students", the author mentioned that adults learn better visually. And much repetition is necessary. As we all know, memory is lacking as people grow older. So, it would make things a lot easier for yourself really to learn to read music notations to aid you in your learning.
Not sure what you mean by making music with orchestra samples. Do you mean to do sequencing? Like playing all the different instrument sounds and putting them together to a song?