What exactly would you like to do with Bitcoin? Are you looking to invest in cryptos in an attempt to hedge against traditional currencies and equities or are you looking to use it to actually purchase things? Regardless, I assume that you probably want to start small and see how you feel about it. As such, I would suggest setting up an account with Circle.com or Coinbase. Coinbase allows for greater amounts to be transferred at once (as in cash to your Coinbase account and then to BTC), but for someone just getting into it Circle is probably better due to the fact that transactions are free (Coinbase charges a nominal fee) and after 3-6 months, the amount that you are allowed to transfer is raised SIGNIFICANTLY. With either you are able to create a unique wallet identifier in order to conduct transactions in BTC.
Please feel free to respond or send me a PM if you have more specific questions.