This is just one of many methods, but it was a simple enough process for me to understand.
There are more direct processes, but this is what I know how to do so this is it. Hope it helps!
Go to https://www.coinbase.com/
Create and account and fill out the information.
Use a mobile number to confirm (requires text)
Set up and verify your bank account information, this has to be done legitimately. Then, get ready for the next step!
P2:
https://hive.blog/hive/@hive-promo/how-to-hive-lesson-2-2-buying-crypto-and-converting-to-hive-power
P3:
https://hive.blog/hive/@hive-promo/how-to-hive-lesson-2-3-buying-crypto-and-converting-to-hive-power