Finding where the key tops are is largely down to familiarity/practice, and it’s possible your netbook had smaller-than-standard key spacing, which then might take some time to readjust to the standard key spacing.
I’m sorry Apple made the key tops bigger and the gaps between keys smaller on this version though, as smaller key tops with wider spaces between tend to help train your fingers to find the right keys and reduce errors from accidentally hitting a corner or edge of the neighboring key. The change to the arrow key layout is IMO a serious regression.
I also think the key travel is a bit too shallow, but after a while most people can sort of get used to it. The new snappier tactile feedback is pretty nice. I wish they could figure out a way to make a keyboard with the old amount of key travel (or even slightly more), very reliable, but with the new tactile feedback which hearkens back to full-travel clicky switches of the 70s and 80s.
Many people used to rubber domes and cheap laptop keyboards end up with a typing style where they really mash the keys down hard into the bottom of the stroke. This especially comes about when people use the cheapest type of rubber dome boards (e.g. the ones that came with most PC desktop computers in the 2000s, including Macs) which need to be pressed all the way down to actuate, and sometimes actuate unreliably unless the key is pressed very firmly; using such a keyboard for any extended time ingrains incredibly damaging habits.
If you try to do a hard mashing style of keypress on a key with extremely shallow travel and not much cushion at the bottom, you’ll put a sharp impact on your fingers with every keystroke, and cause quite a bit of strain. It’s kind of like what happens if someone habitually runs wearing shoes with thick padded heels, landing on his/her heels with every step, and then switches overnight to running barefoot on concrete, without changing running form. Ouch!
If this describes your typing style, try to figure out a way to type with a lighter springier kind of stroke, ideally with your forearms and palms floating in the air above the keyboard instead of resting on any surface. Try to type with just enough force to reliably actuate the key, but not much more. (Irrespective of which type of keyboard you are using.)
Edit: in response to otempomores’s dead comment: this is not intended as an apologia (maybe try reading more carefully?). As a long-time keyboard nerd, I’m just sharing some of my impressions of the changes (positive and negative), and providing some hopefully helpful additional feedback/advice, most of which should be broadly applicable beyond this particular keyboard.