It is very easy, just like shopping on amazon or aliexpress.
We recommend you to sign up first to prevent losing your shopping cart.
Filter out the products you need by category and search.
Go to the product page you want, select the color, size and quantity. then click add to cart one by one.
Go to cart page and reconfirm the appearance and quantity of the items you need.
Enter the receipt information, submit the order and make a payment.