Special Relativity has been around for ~100 years, General Relativity for ~90 years. I'm hoping that with the assistance of Maple and Mapleprimes I may be able to do some tensor calculus to better understand Einstein. Perhaps the twin paradox is within my reach. Perhaps even the orbit of Mercury.
I have read A Journey Into Gravity and Spacetime by John Archibald Wheeler. I'm looking for another book and Introduction to Tensor Calculus, Relativity and Cosmology by D. F. Lawden looks like it might do the trick. The website Einstein's Equations looks like it will be helpful.
I would like your advice and of course, I'm looking for the golden road.
So the question is, how do I get there from where I am?