How can I display specific collection items in custom Liquid?

[yungmuehle]

Hey, 

i wanted to create a custom Collection display where you can swipe through different products. 
Can you help me to find out how i can call Items from a specific collection to display the Image, price and so on in a custom Liquid ? Even if someone knows how to switch them randomly if a button gets pressed i would be very thankful ! 
Thank you !