I see you are in AZ. One way to but BTC is coinbase.com. It is a bit of a process to link your bank account and verify. You will have lower limits at first, but if you use your ID to verify your identity they will raise your limit. Once you have a few transactions under your belt i think they raise your limits too. Remember, It's not instantaneous. It will take a few days for your money to leave your bank account and for the Bitcoin to show up in your coinbase wallet. However, you will be locked in at the price when you completed your buy order. You should be able to find a bunch of videos either on Steemit or Youtube to help you.