In the Perl documentation, see:

• perlfaq1 — general information
• perltrap — traps for the unwary
• index-platforms — platform-specific information

And if you have access to the Camel Book¹, see especially:

• “The Pursuit of Happiness,” Preface, pp. xxiii–xxvii (on the advantages of using Perl)
• “Common Goofs for Novices,” Chapter 21. Common Practices, pp. 679–691
• Chapter 22. Portable Perl, pp. 721–730

Hope that helps,

¹Tom Christiansen, brian d foy & Larry Wall with Jon Orwant, Programming Perl (4^th Edition, O’Reilly, 2012).