I actually find OO in Perl much easier. I don't do a whole lot of OO programming, but when it is useful I would not have it any other way - mainly because I am not restricted in virtually any way.

As it has been said, Perl OO programming (as does any) requires a lot of practice and refining. Regarding books, Conway's book on OO Perl is not only the best book I've seen on the subject, but the coverage of Perl topics (closures, globs, etc) is by far the best I've seen in any book. It is worth getting even if you have no intention to ever writing OO Perl.