Need inventory system Unity 3D mobile games

Hello, I need an inventory system similar to fortnite where i can use 4 special items during gameplay, 6 stickers and 6 dances. It must work within gameplay logic. The items must also be unlocked during a ui panel similar to an rpg by ingame points obtained during gameplay. More detailes during private message. Must be completed in 2 weeks. 1st milestone will be released upon sending a workable version prototype of proyect.