You mean trying to write an own version of perl as part of trying to learn it? No i guess not.
I dont think that the wheel approach is something that worky everywhere and everytime, but it worked for me on several occasions and helped me to understand things more quickly and clearly. It has his limitations as has each learning technique and i guess it mostly depends on the personal learning style of a person.
"WHAT CAN THE HARVEST HOPE FOR IF NOT THE CARE OF THE REAPER MAN"
-- Terry Pratchett, "Reaper Man"