This is not about whether or not Bitcoin is anonymous. This is not even about Bitcoin. You don't have a Bitcoin yet, do you? All you have is fiat. That is the problem. You are going to buy Bitcoin with fiat. And because all you have is fiat, you cannot easily spend it without revealing some personal information. This is fiat's problem.

If you don't want to transact using CC or Paypal or bank deposit or remittance services or even cash because that would mean revealing your entire person, then I don't know how you would be able to spend that fiat. Try searching within your local city or town if there is a Bitcoin ATM nearby.