I currently subscribe to 200+ mods and use about 180 of them for my playthroughs but here are a few to get you started. I've not actually played Rimworld since 1.4 came out. They all are either updated to 1.4 by original authors or someone made an updated version now.
Wall light, complex jobs, rim hud, drop all inventory, Go the **** to Sleep, Do Your ******* Research, smart speed, quality builder, replace stuff and P-music
None of them change the balance of the game (wall light maybe) just make management of your colony/ pawns much easier
RimFridge and Simple Sidearms are great but do make the game a bit easier.