I intend to use the HW with Electrum and MyMonero/Moneroju.
MyMonero is not compatible with hardware wallets, as far as I am aware. For a desktop wallet you can use with a hardware wallet, you'll need to use the official Monero GUI wallet:
https://www.getmonero.org/downloads/#windowsMoneroJu supports Ledger devices.
Take note that official Monero GUI wallet require you to perform sync that took some time (even if you choose remote node option)