Like, are they different enough as languages to not confuse me or are they too similar to each other, like French and Spanish for example. (Seriously, Spanish classes were hard at times b/c I kept confusing things with French T_T)
I'd like to start learning Korean right now, and Japanese in a few months once I have enough money to afford the necessary materials (In Germany, it is WAY easier and cheaper to learn Korean than Japanese...). So, would it be realistic to eventually learn them both at the same time?

My thanks to everyone who decides to answer! :)