I’m not the most technical, but if you are using custodial services they of course know your balance and the transactions youre making. But it’s more private than on chain for forward /backwards looking privacy.
I’m sure some of these nerds could explain it way better than I. But I wouldn’t have one large UTXO. I’d rather have many small ones, that way when you are transacting you can pick chunks closer to the amount of your purchase.
