Im super new like a lot of people. I have a nano s ledger and I attetpted to send ltc from coinbase to the ledger only to realize I used the btc address on my ledger. Is this recoverable?
If you send some criptocurrency to an address that is of another criptocurrency that is a valid address in the first one too you have lost your money if you don't own that address in the criptocurrency you made the transaction from.
The only way I can think you could recover the money sent is to make another transaction to an address you own while the wrong transaction still have not been confirmed, maybe with an higher fee hoping to have it confirmed first.
Since the bitcoin address entered by mistake and litecoin address intended are derived from same mnemonic words, simple scanning the mnemonic into a litecoin wallet that scans a bit of the HD-key tree for balance, should work.
You can try entering your mnemonic at https://iancoleman.io/bip39/ and playing with the values. If you fix the purpose to 44 and coin to 0, changing the values of 'account' and 'internal/external' should reveal your bitcoin address in question in the list at the bottom. Once you do, you will know its private key and should be able to then scan it in a litecoin wallet.
I believe the derivation for segwit adress for bitcoin and litecoin are more or less the same (M/3. Try importing the private key of the btc ledger adress in a ltc wallet.
Anyways they changed the 3 adress to a M adress because of this. However these adresses are still valid.