Hate it for ya, it suck’s! Like you said at least you got practice now lol! The piece your line hooks to has an o-ring in the back side where it connects to the slave! My first one, you could spin it pretty easy! That’s where my fluid was leaking! Probably yours too. Common issue with aftermarket slave’s like this! Check it when you get it pulled out! About bet you it’s loose right there! Be sure to check the replacement out for this problem. Should feel resistance if you try and spin that piece! My second one felt better when I checked it, so I took a chance! Throw out bearing on it is a little noisy, but it’s not leaking! So I can live with it!
Hope this gives you some insight on what to check out!