Pumping HELP!!!

So, my son is 2weeks old and I've soley been nursing . He latches great and no issues. I've started pumping recently to start a stock pile and having no luck . I only get like 1-2 oz sometimes only half oz when pumping. He's currently nursing 2-3/hr so finding the time to pump is hard enough then when I do I barely get anything . Does anyone else struggle or have any tips for me?? I'm struggling bad 😩😩
Thanks in advance