Ummmm... hate to tell you, but once you figure out your sizes in various manufacturers’ schemes, you can indeed order shoes over the internet. I’ve been doing that for more than a decade and had few problems.
Also, return policies are a thing. Yes, you can buy shoes on the internet just fine.
Blast from the past written in the ancient year of 1995
Even then Newsweek was wrong.
https://www.newsweek.com/clifford-stoll-why-web-wont-be-nirvana-185306
We’ve bought over a dozen pairs of shoes and boots that way, over even more years.