1) It’s going to be hard. Deal with it. The less you whine, the more you will be loved and trusted. Learn to be strong, learn to power through your fatigue. And remember that it often takes more energy to avoid work than to just do it.Nice.
2) Do the right thing. Ethically, professionally, morally. Be the one everyone can count on to do the right thing; however hard it may be.
3) Humans, to paraphrase Blaise Pascal, are glorious and wretched. Capable of nearly angelic goodness and demonic evil, they will both thrill and disappoint you. Be neither too judgmental nor too naive. And remember that you, dear ones, are human as well.