Hey Andrew,
Petko gave you the best piece of advice in trading :)
I was also warring a lot at the beginning about the leverage, the type of account, what currency it will be….unfortunately I understood that this is not the most important, the hard way. I zeroed 2 live accounts.
So yes, you need to learn and master the strategies or the trading system you are going to use and the rest will just come as you go. When you practice the strategies, the EAs, or whatever you trade, just switch from a broker to broker, and fit your trading so when you feel ready for the live push, you will know how to do it.
Cheers,