Definitely don’t use swap since you have a non-replacable eMMC. Instead, use zram. I recommend using the zstd algorithm for zram with a 4x compression ratio (so 16GB zram).
Which means that zram size will be 4 x the size of ram, and a maximum of 64GB. So on your Chromebook, that would be 16GB. If you don’t want to limit the max you can just set zram-size = ram * 4
Yeah, for beginners easy-to-install distros like Fedora, Ubuntu, and Pop!_OS are better. Another reason I don’t install Arch is because archinstall always fails.
You should familiarize yourself with what those options actually mean.
Having a separate partition for /home seems to be a personal choice, I’ve tried both and since I backup my files anyway I don’t personally see a difference between having a separate partition or not.