Bitcoin Litecoin Dogecoin and testnet3 transactions

does anyone know how to send a transaction on bitcoin litecoin dogecoin and testnet3 (BTC) using bitcoinlib using python? I have been trying but havent been able to come up with a solution, All i have as an input for the transaction is the senderwallet's private key. it should be possiable to sign a transaction with just the private key, could anyone help me on this i am attemping to build a crypto wallet app and whats a wallet without a send option. I am more then happy to share the code that I have rn and the errors i am getting, thanks for your time