Wikipedia is extremely functional and convenient, but there are instances where it can be inaccurate. I wouldn’t recommend it for accademic research, better stick to first hand information, like books from researchers and historians. But for casual learning of words and concepts, there’s no harm in using it.
Hope to be helpful.
Consider yourself lucky, I pay around 100 euros for a 100Mb wich does not even reach 40 in download at times. (Italy)