Quick link won't 'click' I'm brand new to bicycle maintenance/repair and just replaced my chain for the first time which I'm very excited about. I do, however, have a problem. I used a quick link to attach the chain and I haven't been able to get it to 'pop' into place. I've pedaled it a bit while it's upside down and everything seems fine, I'm just not sure if it is. I don't want the chain to let go on me all of a sudden (I can easily undo the link by hand right now, seems too easy).

Does that seem right?
The master link on the picture looks properly closed. Master links for 8- and 9-speed chains often do not require tools to open them, while 10/11/12/13-speed chains are better approached with special pliers.
Be, of course, sure that you use a master link that matches your chain and is not too wide, e.g. an 8-speed one for 8-speed chain, 9-speed for 9-speed etc.