Queueing Mechanism For Users | Reducing Direct Load On Backend Servers | Low Level Approach

Trying to implement an approach to reduce direct load on backend services by implementing queueing mechanism for users. The users can be queued and redirected to another route for the time being and then be redirected to the original application once the queue moves forward.
It's just a low level implementation and an approach, may not actually work at scale as these services are provided by many platforms.