Owl carousel Help

Hi, iam using owl carousel i did the basic settings pasting cdn etc…
but now i need help in sizing images, iam tring image to be atleast 60% of viewport height but then image width is shrinking and not looking good i also tried object fit but its croping the image also i need nav buttons to be placed in image. kindly help
OR
anyone who has used owl carousel and know what setting should be done apart of setting iam trying to do. that would also be great.
thanks

pen is –
https://codepen.io/gurpreet_singh9189825/pen/RwoJmjE