Congratulations! Yes it can be very difficult at first and it does feel like all you are doing is feeding.
I tried a wet facecloth on my babies feet to try and keep them awake. Sometimes it worked.
Another reason a baby might cry which has not been mentioned yet, is he may want to held. After all he has been held constantly up until he was born. I found the use of a baby sling or carrier worked a treat.
Give yourself some time to rest and really, really it will get better. It is a total shock having a baby something no one can prepare for. If you feel you need help, keep asking, you can probably get more help from your midwife or a lactation consultant, here, a new mothers group, etc.. However your milk supply will take some time to settle down and you and your son are still learning.
Larissa
Mum to 3