Let's try a simple example for your program. Let's just say that you wanted to have multiple characters. You could have %characters hold them, with their name as the key, so that $characters{'Bob the Fighter'} would hold Bob's info. What is Bob's info? well, he'll have Attributes, Feats, Skills, Level, and so forth. Each of those could be a hash storing more detailed info. Let's initialize a sample:

$characters{'Bob the Fighter'} = {  #The brackets create a reference t
+o an anonymous hash.  
    'Attributes' => {     # We're nesting a second hash
        'Str' => 10,
        'Dex' => 10
        },   #Done with that hash
    'Level' => 1,   #Storing a normal scalar
    'Feats' => {  #Another hash!
        'Light_Armor' => 1 #Treating as a boolean
        } #done with Feats Hash
    }; #done with hash that is stored in $characters{'Bob the Fighter'
+}
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References are key to any complicated data manipulation in Perl. I suggest experimenting.