Chinese vs. Japanese

Okay so. I've planned to learn an Asian language, but I'm stuck between 2.

These are Chinese(mandarin) and Japanese. I know its sorta biased, but can you guys give me an indication of which I should learn?

I want to go to either country and teach english as a second language, but which would be more "opportunistic?"

I've studied Japanese to fluency and I've studied Chinese some. I'd say Chinese is a language easier to master than Japanese. The only hurdle is Chinese characters, but Chinese does it right, by having most Chinese characters with only 1 reading, thus making it 5x easier to remember the Chinese characters than in Japanese. Yes, there's more, but when you get like me where you know like over 2000 characters, more characters is fucking nothing, and your brain has become attuned for learning them. From Japanese alone, I can look at Chinese and recognize 85% of the characters already purely from Japanese.

The grammar in Chinese is probably the easiest thing I've ever seen, too. Japanese is a completely different monster. You'll find people who studied the language for 4+ years and still struggle with the particles like wa and ga that are introduced like in the first day of class.

In my first semester in my Chinese class, we learned over 400 characters. In my first Japanese class, we knew like less than 100. Hell, Chinese people struggle less with characters when you compare them to Japanese who only have a third to remember which just comes to show.

Of course, both languages will probably take 3-4x longer to learn than Spanish if your native tongue is English so they are hard, just that Japanese will probably take more time. Knowing either of the languages will probably cut the other time down by 75% though so why not learn both?