He's just a normal human baby. We're not designed to sleep alone, we're hard-wired to seek out physical intimacy and need help to settle and sleep. It's ok to just go with that, hold him, feed him, cuddle him, wear him, whatever works. In time - and looking back you'll see it isn't long at all, though it will feel like it when you're in the thick of it - he'll learn to do it on his own.
But it's normal for kids to need help to sleep till at least school age. It won't always be like this, gradually you'll shift toward books, cuddle, kiss good night. It's all the same thing, though, parenting to sleep is normal for our children.
The art of putting babies to sleep is feeding, cuddling, etc.