Two books that are great:
#1 - The Happiest Baby on the Block by Dr. Harvey Karp. Good for getting you through the first few months.
#2 - Healthy Sleep Habits, Happy Child by Dr. Marc Weissbluth. This is an absolute FAVORITE of mine. The instructions are based on over 30 years of sleep research in infants/children. Start reading it now. I wish I had implemented the plan at 4 months instead of waiting until 6 months.
#3 - He's probably sleeping great through the day because he is sleeping poorly at night and is just so overtired he passes out. When you get him up in the morning, open the curtains, turn on the lights and simulate a 'sunny day' to get his circadian rhythms going. He will probably only be 'wakeful' for about 2 hours, so be prepared to put him down for a nap within 2-3 hours.
At 7 weeks old you really can't get him on a 'schedule', but should focus more on a 'routine'. Learn to read and respect your baby's sleep cues and once you notice them start the soothing process (whatever you may choose to soothe - nurse, pacifier, rock, swaddle, calm music, etc.). Create a routine for EVERY time your child will go down to nap or sleep for the night and be consistent with it. Children become less anxious when they know what to expect and are more likely to know 'when it is sleep time'. Additionally, implementing the routine will promote a natural 'schedule' that most children seem to follow (morning nap, afternoon nap, potential third nap, good bedtime).
For the first 8 weeks our baby slept in his room in his vibrating bouncy seat. After that, we cut it out cold turkey and put him in the crib. He transitioned without a hitch and was 'sleeping through the night' at 2 months from 8:30 - 4:30-6:30. So, what you might want to try is nurse him in his room and when he is finished, transition him to a bouncy seat or his crib. If he cries, go in and reassure him then let him be. Sometimes a baby will fuss for a few minutes then fall right asleep - do you fall asleep the minute your head hits the pillow?
Feel free to send me a PM with any questions or more suggestions. My baby was sleeping great, but on a really funky schedule and napping only in my arms. I had to get serious with a sleep plan because he would be in daycare soon and no one there will hold him for 3 hours while he sleeps, so I knew I had to do something to get him ready. I'm more than happy to help, so PM if you'd like!