I'd bet that it won't take a week for it to confirm, but it's hard to predict the mempools.

If you plan to use Electrum, it'll be straightforward.
After creating a wallet connected to your ledger with the correct account,
the unconfirmed transaction should be displayed in the history after a few seconds (minutes if it's first time install)
By right-clicking the transaction, there should be a "Child pays for parent" option among the menu.