Yep Pirate has made a tutorial on how to change interaction to a FPS style game here https://youtu.be/KYB8FnkydNE, but keep in mind this inventory is made for RPG games you will have to put quite a lot of time into it to change it to a Survival style inventory like have, i do all my testing in 3rd person as i like to see the character but my project is a first person game.
List of custom features in my project this just show you what is possible with this inventory system :D.
Hotbar inventory
Item equip on mouse wheel using the Hotbar
Crafting system with blueprints unlocks
Expandable inventory space using backpacks
Health, Food, Water and Energy/Stamina consumables substances.
Placeable world items
Filters for stashes
Item Durability