Congrats on your new snake!
They can go a long time without eating. I personally would wait until after he sheds to try feeding. It shouldn't matter the last time he ate unless he looks deathly thin - which is probably not the case. The hungrier he is, the more likely he will be to eat for you on the first try. I would wait until after he eats at least once or twice before handling - and always wait 48 hours after a meal to handle.