If you casually want to get into it without the commitment, I've found that even passively watching the Tim Roughgarden videos from Coursera (probably can be found crossposted to YouTube by third parties) to be stimulating in the past.
If you seek to acquire formality and rigor, I can't help you there; I figure shortcuts will be nonexistant ;)
If you seek to acquire formality and rigor, I can't help you there; I figure shortcuts will be nonexistant ;)