My understanding is you make fewer but more replicable mistakes. If you use a wire you have to trace it, keep the length consistent for timing reasons, use very consistent soldering technique, and ultimately you have a hard time tracing issues. With a homemade PCB you generally do get what you ask for in terms of circuitry. Traces are the right length, right thickness, right spacing, and if not then the whole board is similarly impacted, so it is obviously broken or not broken. If you mess up your design then you have a problem, but if you did the process right and you have a valid design then it works.
That all said, homemade PCB is a large time sink and modern PCB manufacture is so cheap and fast it doesn’t make sense to do at home for the most part. You can literally get a complex board faster by ordering it from halfway around the world and having it posted than making it yourself. I would say it is a good learning exercise, not a good manufacturing or prototyping practice.
I have tried both and a bunch of others with a laptop with nVidia and Intel and have had a range of experiences.
Anything Ubuntu based worked out of the box but any significant deviation from the exact current standard made things less stable. Changing WM/DE was not really possible and troubleshooting was opaque. Snap was also a nightmare of broken packages and bad update processes.
Manjaro looked really nice and had that lovely Arch flavour, but it is not really Arch, more Arch adjacent. Lots of things work similarly but lots of things break in bad ways. They have had numerous issues with security, bad updates, and general poor practice.
Pop is cool, I like it, but just not a good fit for me. Cosmic is a great environment but I like to tinker too much and while the team is great and do good work it is just not the same kind of defaults I like.
EndeavourOS is my current pick. It is Arch with sane defaults. It comes prebuilt with a DE configured, backups using BTRFS snapshots, a handy updater and package management config, some cool apps built in, and it is very performant. The guides for hardware video acceleration worked first time for me which has never happened before, normally that is a major pain and takes a few days to get sorted on a fresh install. Graphics performance is awesome, same with built in OOM protection. That said, make sure you have enough RAM. I had 8gb in my laptop and ended upgrading to 32gb after a number of failed builds and messing around with swap to get things to finish. If you have less than 16gb RAM I would recommend upgrading.
Whatever you choose, I would recommend trying a few things before settling down. The right fit is right for today and may change, so try things again in the future if you feel uncomfortable. Also do what works for you, not for anyone else. If you don’t like Arch you are not obligated to use it, same with Ubuntu, Debian, Fedora, etc. Keep the fun of it and play around, maybe just boot up a few live environments and see if something tickles you. I hear good things about Hannah Montana Linux.