I want to know if I'm able to join the navy as a single parent navy nurse?
Yes you can. It will not be easy at times because of work and last minute demands. You will need to have a family care plan which states how your child/ren will be taken care of if you are deployed, sent for training etc. Most care plans
need to have someone local to where you are stationed on it.
If you have a robust family support network to help with your kids it could work. I don't know how long navy deployments are but that is always a possibility.