Good luck with that. So few people who begin lifting actually lift long enough to see any progress. Most quit, and that's a fact. I can't imagine forcing what you want to do down another person's throat will increase the odds that he's lifting one year from now.
Great. It is my opinion that the best lifting for a beginner is the lifting that the beginner does. So whatever gets him enjoying his time in the gym is a great start. If your friend can become a consistent lifter who wants to fit lifting into his life, you will have done him a great service by helping him get there.
I don't think it matters all that much in the long run if he isn't deadlifting right now or if he wants to do decline dumbbell bench press instead of flat barbell bench. It all works when you're a beginner. Just help him have fun with it and nudge him towards making lifting something he does.
If your friend wants to get more serious with his lifting, he will. That's always going to be on him, not you.