LN liquidity question.

[PepeLapiu]

Hey guys. I am a p2p trader. I automated my trades on HodlHodl and I am now the top trader on there.
https://hodlhodl.com/users/PepeLapiu

I am now looking to expand to Robosats. But I don't know much about Lightning.
I just opened an account with Voltage to run my own node in the cloud.
Now a question about liquidity.

Say I open a channel with Bob. And I commit 10 BTC to the channel and Bob commits none.
I understand this way, I can only send BTC, not receive any.
But say I send 6_BTC out of the 10 BTC I commited. Does that give me a 6 BTC space in my channel where I can now receive 6 BTC?
Or is the only way to receive Bitcoin to find someone to commit coin to our channel?

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[PepeLapiu]

And if the only way to get both inbound and outboard liquidity opening a channel where both sides commit BTC, where can I find someone to connect with me?

The way I understand it is I can open a channel with a well connected node and commit 10 BTC to it while not asking the other side to commit any coin.

Once I have sold my 10 BTC, I can go to my supplier and buy more coin and have it sent to my LN node. I imagine if all my 10 BTC are sold, I can top up with 10 more BTC. Is this accurate?