Don't get me wrong, i love the bitcoin technology, and part of the bitcoin community... But crypto currency will remain a high risk high reward investment for now... If you are a broke man, i personally wouldn't invest my last $200 in BTC... But that's just my personal opinion.

IF you really want to go trough, here's a partial list of possible BTC/FIAT exchanges: https://www.coingecko.com/en/coins/bitcoin/trading_exchanges#panel
Next to this, you have localbitcoins, this forum and probably another 100 places where you can exchange. Do your homework and see which exchange gives the best rate compared to the fee compared to their trust rating...