If I were in your shoes I'd remain with Oanda. With other brokers you're going to be forced to risk at least 4%-5% per trade that's much too much. You won't get a chance to use the most essential ability whatsoever, risk management. At least with Oanda you can exchange micros and give yourself a chance to learn something. In terms of leverage, you shouldn't be considering more than 20:1 in my frank opinion.
Steve