After about 5 hours, you'll be able to think "I'll never be able to hover"!
Seriously though, not much after 5 hours. It's going to take a bit more to hover all on your own and even then it won't be pretty. Don't expect much from your fixed experience in terms of actually flying a helicopter. About all it will help you with is scanning, radios, situational awareness and possibly some control but not much.