Hopeful CC
Provided you get in there, know your stuff, work hard and take the job seriously, you shouldn't have any problems. Older crew appreciate it when new crew make the effort to know their stuff, and take their role seriously.
It's only when they don't that things go awry.
When I flew, the ones that tried their best stood out against those who simply didn't give a **** about anyone other than themselves. Those only interested in doing the bare minimum's stand out like you know what on a bull. And that goes for the older crew too. Those that do the work, get the rewards in the long run by way of promotion etc. Those that don't, get the truth revealed with the passage of time.
Good luck on your new career. Just concentrate on doing your best, and I'm sure you won't go wrong!