Well, you have enough tele experience but not ER. Anyway, you can check travel jobs without filling out an app. For ex. Check Cross Country trav corp, RN Network and Medical Solutions, Clinical One's job board are open to anyone. This will give you an idea what's available. Then you can call a recruiter and talk. Only fill the app if you feel it's time. travel nurse gets a 1 bedroom and you will have to pay for the upgrade to 2nd bedroom. Sometimes you get lucky and get a 2 bed as 1 beds not available.
Also, don't worry about your manager getting calls, that's their job. Take your time in this process and post all of your questions with us. Oh, also, you will have to have the state license in hand before applying. Cali + NY takes a while to get