Go In For It
I Vixen has very good point on Latin culture.
If you are unsure which country you want to know, you can continue on LatinAmericanCupid, and get to know women from each countries. When you are ready, you can then focus on 1 country (perhaps into 1 city).
Thinking of going to Jamie's site is bit to early for you especially when you do not know anything about Colombian women. Have few months with dating site (LatinAmericanCupid) first, then start think about going to Jamies, etc
I found my woman through ColombianCupid but also found my ex-prometida through ColombianCupid too.
I wish you the best of luck in searching of your woman