Left a ****ty paying job for aviation, so didn't really notice the difference.
You are not old, I didn't do my first flight until early 30s, now approaching 40 and about to start at a regional.. Did a bit of instruction and a bit of time up north. Probably not realistic for me for a command in a mainline in Aus but you never know, and I'm open to living outside of Aus, so we'll see. You won't have any probs at your age.
In GA, most of the people on the ground, i.e the guys you'll be working with are great with a few exceptions. Those exceptions usually end up in management positions in GA because they can't get a job anywhere else, and they take their issues out on you. Get used to being served bowls of vitriol (poo) that you don't like, don't wanna eat, and don't deserve. Chew repeatedly for about 5 years or so and smile while you do it, then move on..
Good luck..