Going to second other comments. Even without archinstall. It feels like it will be harder than it is. Umm, just save yourself a bit of time and configure the network and install a console editor (nano/vim whatever) while in the chroot (if going full manual). It was a minor pain to work around that for me.
There are pages discussing how to do everything (helps to have a laptop with browser, or a phone to look them up). At the end, you generally know exactly what you installed (OK no-one watches all the dependencies), and I’ve found any borks that happen easy to fix because I know what I installed.
I mean the list is 50% weird and 50% sensible. I think the idea is that there’s someone most people will know that are in “trustworthy” professions/positions. Although, professional photographer. Not really sure they would be in a more trustworthy position than any other job.
Going to say, I think most of us here either used to pay their GP whatever fixed fee they had. But they’ve taken that option away. Apparently the profession complained. I don’t get that. I mean they by definition know you the requisite amount of time. They literally need to sign that is the case and take your money. But, there we go.
I do luckily have a few friends that are solicitors/barristers. So I generally just ask one of them, and it’s only once every 10 years so…