Hello everyone, I gave birth a week ago, I'm not getting much milk wit…

Hello everyone, I gave birth a week ago, I'm not getting much milk with a breast pump and only on the left side because it doesn't take it and it comes out 70mg, and from the other one, barely any, and when it takes it completely grabs the nipple, but it pops out and I have to give it again, what would you recommend for good suckling?