ELISHEVA,
Ah yes, the Tk wall. I think it is still covered with the blood from the pounding of my head against it. Even after I gained a fair amount of proficiency - I still thought it looked fugly (How do you make Tk look good?). I found the following links helpful:

• Learn the Perl/Tk module, Part 3: Advanced widgets (parts 1 & 2 also linked)
• Gtk2-Perl Tutorial (alternative to Tk)

I also bugged Khisanth on #perl IRC (freenode) as well as zentara and other monks here.