Depends on what coins you want to buy. If you are wanting to buy btc, ltc, or eth with usd, coinbase is probably the easiest. If you already have some cryptocurrencies, bittrex is pretty good to start. Once you learn more you can go to different exchanges. Follow @marketingmonk he does a short daily show that will help you get the hang of things.
Hope that helps! Good luck.
Thx :) im not that big of a noob . I meant where to buy the tokens from the article .. when will they be listed and where .
Oh... right... haha.