Note: Some of these mods might get you banned from online play, so we recommend trying them out in offline mode.
The easiest way to do this is to set Steam to offline mode, or simply disable your internet. Also, always back up your files before trying out mods. This advice applies to any game, not just Elden Ring.
You can actually pause Elden Ring without this mod. However, it's a very specific exploit that requires you to go two menus deep, and good luck doing that when the bad guys are chasing you down.
It's not quite out yet, but if you want to try out an early prototype, you'll need to support LukeRoss's RealVR Patreon at the $10 level. That also gives you access to his other VR mods, including one for Red Dead Redemption 2. Not a bad value.
By far the most ambitious Elden Ring mod to date, Reforged overhauls the game at a basic mechanical level. There's an entire lengthy Google Doc of changes, but overall, it boosts many of the game's weaker weapons and spells, fixes some of the jankier hitboxes, and even adds optional difficulty settings and the like.