For (1), a userscript like this does wonders. There's also a way to replace new-reddit links with the old-version, but it takes a bit of tinkering to get it to work on google.

  // ==UserScript==
  // @name     old_reddit
  // @description replaces www.reddit with old.reddit
  // @match    *://www.reddit.com/*
  // ==/UserScript==

  const url = new URL(window.location.href);
  window.location.replace(`https://old.reddit.com${url.pathname}`)