There is no way to see individual addresses and the balance contained on each address with Ledger Live. As you say, the best way to do this is to hook up your Ledger to Electrum. There are instructions on how to do this here: https://support.ledger.com/hc/en-us/articles/115005161925-Set-up-and-use-Electrum

Using Electrum also gives you the added functionality over Ledger Live of having UTXO management, which allows you to choose which addresses to spend your coins from, as well as having native SegWit support.