Another vote for Porkbun here. I switched after Google Domains shared they were selling off to Squarespace. It’s been a lovely experience and their website just seems more human than the other big players. Cloudflare isn’t a terrible alternative option as long as you’ll be using their DNS.
Tampermonkey will do what you need. It’s not point and click, but writing the custom script shouldn’t be too difficult for someone very new. You essentially just need to complete a find and replace upon page load. The %2F and similar costs are just ASCII characters in percent-encoding and can easily be parsed.
I’m unsure what benefit you get from this though. It seems skimfeed is just trying to capture which lists and posts get visited so they can adjust the site according to popularity. Doing this via an exit link removes any need for cookies (which I didn’t check for, so maybe this ain’t what they’re using it for).