you need to learn a bit about channels and how they work.
check the guides.
if you open a channel with onchain sats then this is an outgoing channel, it’s your sats - you will end up with outgoing capacity and no incoming capacity (until you sent some sats out)
opening a channel form an LSP gives you a good, big channel with incoming capacity, that costs.
channels are not provided by Alby.
channels are the foundation of the lightning network.