• I want to get all the records where the field agency referral is true and the field contact update = false
• I want to update contact records based on records info
• and update contact update = false

This is the code that I have for now since I'm stuck and need help.

Apex class:

global class UpdateContactFromStagingObject implements Database.Batchable<sObject> {
    List<Contact> conList = new List<Contact>();
    global Database.QueryLocator start(Database.BatchableContext BC){

        String query = 'SELECT  AS_Contact_Id__c FROM Contact_Staging__c WHERE AS_Agency_Referral__c = True AND Contact_Updated__c = False';
        return Database.getQueryLocator(query);
    }
    global void execute(Database.BatchableContext BC, List<Contact> batch) {
        System.debug('batch=='+batch);
        Set<String> conId = new Set<String>();
        for(Contact_Staging__c a : batch){
            conId.add(a.AS_Contact_Id__c);
        }
    }
    global void finish(Database.BatchableContext BC){
       
    }
}

Scheduled Batch Class:

global class UpdateContactFromStagingObjectSchedulable implements Schedulable {
        
    public static String sched = '0 00 05 * * ?'; 

    global static String scheduleMe() {
        UpdateContactFromStagingObjectSchedulable SC = new UpdateContactFromStagingObjectSchedulable(); 

        return System.schedule('Update Contact Records', sched, SC);
    }

    global void execute(SchedulableContext sc) {
        UpdateContactFromStagingObject batch = new UpdateContactFromStagingObject();
        Database.executeBatch(batch, 200);
    }
}

Is there anything I need to add? Thanks.