Need help with backpack icon.

[Cutest Kenan (They/Them)]

So I got an item done, textures, model all of it, done, and it fits perfectly on sniper (Got screenshots of it in my screenshot folder thing on steam ;) but honestly, the hardest part of this was the backpack icon, I've tried for hours but I cannot get it to work ever, please, if someone is willing to do it for me or help me step by step, then please add me ;n;