Good luck.
I have a friend who tried the same thing.
Joined the Navy and spent four years on destroyers.
Then joined the Army to go become a helo pilot. Had his class date and everything when the peace dividend of the early 90's canx his plans. The Army said basically we are sorry, we are downsizing, what would you like to do now? He opted for airborne and went to jump school but broke his leg on his 5th jump. By then he was pretty discouraged and got out when his hitch was up. Says that hindsight is always 20/20 and if he'd known what was going to happen he would have stayed in the Navy.
He always had good things to say about the Navy and crappy things about the Army. Even tried talking my son out of going into the Army. My son doesn't regret the decision to go in the Army but he now understands why my friend said some of the things he said. My youngest son wants to be a 19D cav scout and I've been trying to talk him into joining the Navy or Air Froce.