Learning about the universe or special/general relativity I have done a standard course in differential geometry/Riemannian geometry. Am I now able to understand the concepts people talk about when they say things like "spacetime is curved" and when I see things like outer space looking curved. Does one need to know other physics concepts or can I just learn it from now?
Can anyone recommend me anything to learn it from? I want to learn about things like black holes and metrics and want to avoid things like electromagnetism etc.
Thanks

The canonical book for GR is Robert Ward's book. Physicist usually are a bit scared of it because it has to much Differential geometry.. It is a excellent book. I think it is quite good for mathematicians. If you want to learn a more physical approach to GR I recommend Weinberg's GR book.  
