So my understanding is, you have a wallet, that wallet has a hash ID and thus is basically anonymous. But if someone connects that ID to you, you aren't anonymous anymore.

I heard you should use a new wallet for every transaction. But if I send money to the new wallet from my personal wallet, won't that be on blockchain forever? Thus making it identifiable? Or if I send euros/dolars to my new wallet, won't that connect me to the new wallet?