You need to have inbound liquidity, yes. Opening channels gives you outbound liquidity, so you’ll need to send some sats out of the channel to get inbound liquidity, or have/pay someone with a routing node to open a channel with you.
Is this your first time setting up a Lightning node?
Yes I never set it up before and was just using the Bitcoin node.
You can buy inbound liquidity from a site like https://amboss.space/magma
For example you could buy a 1M sat channel (for a small fee) and someone will open a channel to your node, providing you with inbound liquidity.
Or if you know anyone with a node that has public channels you can have them open a channel to you.
