Simply choose a Forex Broker (of which there are many) preferably in the same region that you operate and in the same currency. Each region may have specific laws about what you can and cannot trade. Sign up with the forex broker of your choice and follow their instructions. At this point you will be able to download their trading platform.
You can find a list of forex brokers we use by reading our Forex Brokers Guide.
There are 54 Million people in the US with a 401K retirement fund of varying sizes, however unbelievably there are 96 Million people that do not have one at all.