Scheduling another worker from another worker

I have read the following post on WorkManager about scheduling worker from another worker. I am attempting to convert our job services, which are written in Java, to WorkManager in Kotlin.

In our current code base, when a job service is invoked, it can conditionally invoke another job service.

I have a custom job service which fetches Firebase token in the background as follows:

public class FirebaseJobService extends JobService {
   
   @Override
   public boolean onStartJob(@NonNull final JobParameters jobParameters) {
         // Fetch Firebase token
         String firebaseToken = FirebaseInstanceId.getInstance().getToken(
             "12345" // Unique sender Id
             "FCM"
         );
         // Persist fcm token to local sqlite db.
         // Make another request to activate token on our backend. This is handled by another job service.
   }
}

This service is currently invoked by another service given below

public class MyCustomJobService extends JobService {

   @Override
   public void onStartJob(@NonNull final JobParameters jobParameters) {
     . . . . . 
     
     boolean isForceActivationRequired = checkIfForceActivationRequired();
     
     String userId = getUserId(); // Helper function to get the user ID.
     
     // How can I call this service
     if (isForceActivationRequired) {
        PersistableBundle bundle = PersistableBundle();
        bundle.putString("userId", userId);
        bundle.putBoolean("forceActivation", isForceActivationRequired);
        JobInfo.Builder jobInfoBuilder = new JobInfo.Builder(1500, new ComponentName(context, FirebaseJobService.class));
        jobInfoBuilder.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY);
            jobInfoBuilder.setExtras(persistableBundle);
        
        // Schedule the job
        final JobScheduler scheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
        scheduler.schedule(jobInfoBuilder.build());
     }
   }
}

I am trying to convert MyCustomJobService to use WorkManager library and subsequently all the other job services as well. My questions are as follows:

1. How can I schedule work request from a job service? I plan to convert the job service at the bottom to worker implementation.
2. Once I have migrated more than one workers, then how do I schedule one worker from another? Their outcome is independent of the other, so they will have different job IDS.