Hello @kalinprod
QloApps is an independent platform just like Wordpress. So you cannot setup QloApps on Wordpress but these two platforms can be integrated to suffice your needs.
There are two approaches possible for this,
1- The free one: You can give a Book Now button on your Wordpress website and install QloApps on your sub-domain.
On clicking this button the customer will be redirected to QloApps website. Then he will be able to make the booking on the QloApps system.

2- The Paid one: We can integrate QloApps and Wordpress. So that the booking will be done from your Wordpress website only.

If you want to go with the Paid service and want to discuss more details on it then please raise a ticket at https://webkul.uvdesk.com/en/customer/create-ticket/