well, I'm not a travel nurse, obviously, but I can probably shed some light on this.
Most companies will still want at lest a year of experience. You might find one that will feel comfortable with you having only six months, but it's probably a long shot.
It sounds like you have a good background to get into travel nursing. I wouldn't recommend doing it though, until you feel completely comfortable on the floor. There are a lot of little things that you may want to get down first.
Not that you could not do it, but remember, you will be the new person there, and sometimes there is a great deal of resentment towards travelers. Having experience with the unexpected things that arise will cut down on that flack that you might draw.
I hope that makes sense, but hey, what do I know...I've never done it
