honestly if you know a easy pair and a easy system (and by easy I mean profitable at 100%) someone will buy your brain and sell it
there's no easy way to tell what's the pair to start.. you need to test test and test techniques and try on a demo till you know one that best work for you, but there are a lot of things involved like risk, brokers, and stuff like that.
If you are planning to start spend a ton of hours reading about forex.
I'm not a pro or an expert in this field but i'm doing my best to learn what i can to get the most out of forex.
Good luck on your journey