How do you "know about things" in Chinese? What's the easiest or most common way? 我对中国的地理知识还了解得不太多。


This is quite a complex way to say "I don't know too much about geography of China".


How do you say it easilier?
I'm sure you can use both 知道 or 了解. But is 对 the only correct translation of "about" here? Can you say it using 关于? 
What would be the most common way to say it?
我不太了解中国的地理

我不太熟悉中国的地理

You can replace 对 with 跟 or 和 if you like.