First off I recommend using Thunderstore to download mods: https://www.youtube.com/watch?v=37ERV1RPCYo&t=122s

Mods that might add more content to your game:

1) SouthsilArmor
2) Hugos_Amory
3) Chaos Armor
3) OdinArchitect
4) Valkea
5) Clutter
6) Plant Everything

Quality of life mods:

1) Mining: Adds a skill that increases damage dealt while mining and item yield from ore deposits.
2) Foraging: Adds a skill that increases item yield while foraging and makes berries and mushrooms respawn faster.
3) Lumberjacking: Replaces the wood cutting skill with a Lumberjacking skill. Increases damage dealt to trees and item yield from trees, reduces damage taken from falling trees. Also increases movement speed in forests.
4) Teleport Everything
5) Handy Portals
6) Blast Furnace Takes All
7) Craftable Chain: I used this because the armor mods required A LOT of chains to craft