I think it's a great idea to get back into it!
I hope I can be of some help. First off, I think Weinberg's book is great for reference, but is certainly not meant to be introductory. To the above reference list I'd add a nice and rather light intro text -- Quantum Field Theory by Lewis Ryder. Good blend of conceptual and mathematical development. If you are interested in particle physics at all, Griffiths particle book is a stimulating introduction.