I did 3 years of military and the best advice I can give you is no one's experience is the same, some people love the military and how structured it is others hate it they feel like they're being tied down with way less freedom than you would have other wise. Also it depends on your unit some units are chill long as you're doing your work and organized they won't harp on you to much but others will get in your face if a single button is out of place
My advice to anyone going into the military is this if you can get through boot camp without quiting or breaking down then regular military is a cake walk
Do what you're told and show up on time
Now when you get higher rank and more responsibilities it may get a bit more difficult but still for the most part it's a pretty chill life style
If you can't handle boot camp then don't join
I was in the army tho I can't speak for the navy I have no Naval experience