Any FNP's work in Pain management? other speciaty practices?

Hi all,
I am almost finished with my FNP schooling (hooray!) and looking into various specialties as an option to primary care clinics. Does anyone have any advice on an interesting specialty where they are/were willing to train you?
I have an interest in Pain management clinics, doing injections, etc. I also have an interest in gastroenterology, due to dealing with IBS myself.
I am open to others, but those are my first choices.

I am concerned/aware that specializing might not be the best move right out of school, but I may have to think outside the box due to limited FNP primary care jobs in my area.

Any advice is appreciated.
Thanks!