How to take an object with "E" key?

Hello; newbie here.

I am trying to do very simple thing for days but I am still struggling.

Thing I want to do is so simple, there are keys in my level they don’t open doors They are just collectables., I want to pick them up and show “key has taken” string.

I have already done pick up mechanism for locked door by watching a tutorial. But you can’t pick up the keys unless you match them with a door.

I don’t have any inventory system or counting system.

I just want to pick up a key by hitting “E”, destroy it, not even hold in my hand. just take it and make them gone.

BUT WHY IS IT SO HARD?

Is it possible someone help me to understand by visualising it?

There you go buddy. Enjoy the mayhem.