Nice! If you actually need help figuring out how to get it working, check out this video from Goulet.

I would suggest doing a quick pen clean first. Some Jinhaos come with a bit of ink in them for testing or some oils from the factory. This doesn’t have to be anything fancy - it’s a $9 pen! Here are some tips but don’t feel the need to get distilled water or anything like that. Just push any ink out, pull up some water with the converter out of a cup, and repeat a few times until any ink that was in there at first is gone. Then dry the nib by holding a paper towel or cloth against it until all of the water is sucked out. Then ink it up!

Especially with these cheaper pens, I try not to be super precious about cleaning them. People get really fussy about it. But the pens are meant to be used and if a few drops of ink are left, it doesn’t really matter. You might see that the ink is a slightly different color at first due to ink mixing, but oh well! It’ll work itself out.

Just use the pen, and if you aren’t going to use it for a while, remove the ink and rinse it out so that it’s not drying inside.