When do things get easier ?!

My baby is three and a half weeks. I think the exhaustion is just starting to set in. I don't feel like I am enjoying my baby how I should. All he does is sleep. Eat and cry when he isn't doing that. he only seems content for short period of time which is when I do enjoy him but again this is rare. I haven't been able to leave the house much. Barely eat right because the days slip away. I'm constantly trying to figure out what is wrong with him and how to make him feel better.m which creates anxiety. Wondering when things seems to get easier and when this newborn stage ends.