Click on Bank Accounts tab. Click New Bank Account button at top of next screen. Fill in the boxes (at least the mandatory one). Click Create button at bottom.
If there is an opening balance on your start date, set the balance via the Opening Balances report.
Download procedures from your bank are independent of Manager. Once you have the file downloaded to your computer, go to the Bank Accounts tab. Click on the Statement Balance (blue number) for the account involved. Click the Import bank statement button and import the file you just downloaded.