Don’t listen to scare tactics. The failure rate at UPS is no more alarming than any other major airline failure rate. The only person that I have specifically heard of that had issues came out of a King Air.
It’s AQP with all the same maneuvers as any other training syllabus that you have experienced. Show up prepared and rested. Practice good CRM with your sim partner in and out of class/sim. Lastly, have and maintain a good attitude. That’s all you need to succeed. The hiring department does a good job of interviewing more than qualified candidates.