trigger MasterOnboardingTrigger on Onboarding__c (
    before insert, after insert, 
    before update, after update, 
    before delete, after delete) {

    if (Trigger.isBefore) {
        if (Trigger.isInsert) {
        // Call class logic here!
        } 
        if (Trigger.isUpdate) {
        // Call class logic here!
        FulfillmentFirst ful = new FulfillmentFirst(Trigger.new);
        }
        if (Trigger.isDelete) {
        // Call class logic here!
        }
    }

    if (Trigger.IsAfter) {
        if (Trigger.isInsert) {
        // Call class logic here!
        } 
        if (Trigger.isUpdate) {
        // Call class logic here!
        }
        if (Trigger.isDelete) {
        // Call class logic here!
        }
    }
}

public class FulfillmentFirst {
    // This will hold the onboarding record passed by the trigger
    List<Onboarding__c> onbs; 
    

    public FulfillmentFirst (List<Onboarding__c> triggerOnb) {
        onbs  = triggerOnb;
    }

    public void CreateFirstFulfillment(){
        for(Onboarding__c onb : onbs){
            if(onb.Fulfillment_Created__c = false){
                // Engage
                if(onb.Product__c == 'Engage'){
                    Fulfillment__c enFul = new Fulfillment__c();
                    enFul.Name                   = 'Engage First Fulfillment + ' + onb.Account__r.Name;
                    enFul.Status__c            = 'Not Started';
                    enFul.Account__c       = onb.Account__c;
                    enFul.Due_Date__c    = Date.today().addDays(14);
                    enFul.RecordTypeId  = '0121I000000G1dkQAC';
                    insert enFul;
                    onb.Fulfillment_Created__c = true;
                    update onb;
                }

                // Social Ads
                if(onb.Product__c == 'Social Ads'){
                    Fulfillment__c saFul = new Fulfillment__c();
                    saFul.Name                   = 'Social Ads First Fulfillment + ' + onb.Account__r.Name;
                    saFul.Status__c            = 'Not Started';
                    saFul.Account__c       = onb.Account__c;
                    saFul.Due_Date__c   = Date.today().addDays(14);
                    saFul.RecordTypeId = '0121I000000G1dmQAC';
                    insert saFul;
                    onb.Fulfillment_Created__c = true;
                    update onb;
                }

                // Social Posting
                if(onb.Product__c == 'Social Posting'){
                    Fulfillment__c spFul = new Fulfillment__c();
                    spFul.Name                   = 'Social Posting First Fulfillment + ' + onb.Account__r.Name;
                    spFul.Status__c            = 'Not Started';
                    spFul.Account__c       = onb.Account__c;
                    spFul.Due_Date__c   = Date.today().addDays(14);
                    spFul.RecordTypeId = '0121I000000G1doQAC';
                    insert spFul;
                    onb.Fulfillment_Created__c = true;
                    update onb;
                }
            }
        }
    }
}