You should visit the exchange section - https://bitcointalk.org/index.php?board=53.0 but there you would find mostly trading and I see that you want to buy bitcoins with cash.

I guess you should visit some person to person trading platform like localbitcoins (although I heard they have removed cash trades) so maybe try paxful or other platforms.

Something you should know about cash trades though, a lot of people will have criminal intentions when they see you with 2 bitcoins worth money with you so maybe either have some friends or security or maybe just meet in a hotel and trade where you feel safe enough to trade, I am suggesting this because I see that you are relatively new here.