Back these up first before testing any mods. Your saves can be found in a location such as C:\Users\ Profile name \Documents\my games\XCOM2\XComGame\SaveData. Just a word of warning in advance of trying these.
If you save a game with some of these mods installed, the save may only load when the mod is active. We’ve looked over the the first batch of mods for the game and these are the ones we think you should take for a spin. Be warned! as modding is fairly new, some of these may affect saves and may not work 100% while still in development. One of the great things about XCOM 2 is that it can be modded, and although the game has only been out a few days, the community is already getting to work.