Sorry, I am new and don't know how to set up shop. So, pls tell me if u know anything k thx bai

First, go to http://dispenser.tf/myshop/

Then, under Steam Inventory (which is your Steam backpack), expand one of the category you wish to deposit items from.

Last, click on (highlight) the items you wish to deposit, and click 'Exchange Items' at the bottom task bar.