"Daughter of the Demon" from BATMAN 232 is one heck of a great issue to start with. As I recall, Batman had only crossed paths with Talia up to that point, and this was the issue that introduced her father as R'as Al Ghul.
There was one previous appearance in DETECTIVE COMICS 411, May 1971, by O'Neil and Bob Brown/Giordano.
I hadn't realized that BATMAN 232 was cover-dated the very next month, June 1971. There were also Ras Al Ghul/Talia stories in BATMAN 235, 240, and 242-245. So yeah, you got in at the very beginning, just a few issues before I started reading with issue 241. I think I first read 232 in the
LIMITED COLLECTORS' EDITION C-51 reprint in 1977, with the highly poster-worthy Neal Adams wraparound cover.
As much as I love the Batman TV series, I don't think I ever saw it before 1975, so I'd already been reading comics for several years by then. But logically, the TV series was/is a cross-media promotion that unquestionably has a lot more visibility than the comics themselves, and is likely what led most readers to comics, before they ever saw an actual comic.
