This is a career not a random job. You need to understand the pros and accept that this job is hard. But with time it'll get easier because you'll have better seniority, your own route, more knowledge, more vacation etc.
I'm a swing driver.. it doesn't get any harder. Show up to work, complain to the fellas, lube up and go. More often then not you'll figure it out.
Get a flash light and dont forget to eat. And yes, you can print maps of your route. If you're a seasonal or a new guy this is the perfect time to qualify. After peak you'll be 9.5 or a hybrid. You won't be dealing with anything like the previous generations went through.
You'll be ok.