To expand on Pieter's answer a bit:
To move your funds onto the lightning network, you will need to send a bitcoin transaction to move your funds into a wallet that allows the creation of lightning network channels. The transaction to move your funds into the new wallet will pay to a bitcoin address as usual (likely a bech32 encoded address).
The lightning wallet will then allow you to 'open a channel' with another node on the lightning network. Under the hood, this means that your lightning wallet will create a specialized 2-of-2 multisig bitcoin address, in collaboration with the counterparty node. Funds will then be sent to this address, and along with a little bit of extra under-the-hood magic, your wallet will now contain funds which can be used to pay invoices on the lightning network.
As Pieter mentione, bitcoin addresses and lightning invoices are very different, so there is never any worry that you will make a mistake and lose funds by trying to pay a lightning invoice with on-chain funds, etc.