To clarify: Tcl::Tk is Perl module from CPAN to connect to Tcl/Tk, so those are different things: Tcl::Tk is a bridge from Perl to Tcl/Tk

But you can use Tcl::Tk with perlTk syntax (see How Perl/Tk and Tcl::Tk are similar and other nodes on that wiki), so no Tcl/Tk knowledge is required, although you'll get more flexibility if some Tcl/Tk understanding will be.

However, if you really have little time for experiments, may be Tcl::Tk is not a way to go.
Still, I have an opinion that with Tcl::Tk you can *save* your efforts in GUI programming, due to less time spent on recompiling and better TIMTOWTDI.