10 years ago I would have a list of kites to stay away from, terrible kites, couldn't go upwind relaunch, all kinds of problems. Today? They are all good. Don't worry too much about which kite you buy. 1 or 2 years from now when you are good enough to have some sort of feeling for what you like you will understand the differences in the kites but for now, any modern kite will get you going. If you are looking at videos and reviews about kites, don't look at old reviews. Second, kites are like blue jeans. I don't care which blue jeans you buy they are going to get holes in the knees after you wear them every day for a year or two. Same with kites. They wear out so don't think about it as a permanent purchase. It's not a kayak. You buy kites to go kiteboarding. Kites I have used over the past 10 years include manufacturers Ozone, Best, North, Liquid Force, Wainman, Naish, Slingshot, Cabrinha . . . I'm sure there are more but I can't think of them. If you ask me about some 2005-2010 kites I have some terrible things to say about all kinds of different kites from all the manufacturers. Anything from 2015 to 2018, I just have nice things to say.
Get out there and start kiting! Quit wasting time on the forums
See you on the water.
Oh and about the harness. It's all about how it fits your body. Put it on in the showroom, walk around put some pressure on it, see if it feels like it pinches anywhere. You want to make sure you feel comfortable in your harness and every body has a different fit for a different harness. Again with a blue jeans comparison. Every manufacturer has a different fit for the body so you want to find something that fits you, not something that fits someone else.