From the home page click products

 

and choose the product category of your choice

 

then click add to cart from the product you want to purchase

 

this will now redirect you to the cart page, from where you can finalize your products to buy

after clicking the proceed to checkout button, you will be redirected to the checkout page.

your can now input your information and click place order to submit order. And after submitting, there will be a success message