Is it possible to donate blood if you have bad veins?

I have always had trouble getting my blood drawn. Even when I was five and going in for an adnoidectomy they phlebotomist wanted to look at my ankles because she couldn’t find anything good in my arms. Being pregnant was hell because they would end up sticking me in the back of my hands or in the arteries I think in my wrists.

I have always wanted to be a blood donor, but I just don’t know if it would be a waste of time. Usually when I get blood drawn it’s a long process, several sticks and they end up using a tiny needle. I’ve been told a million times I have very small veins that roll. I’m willing to go through with it to donate blood, but I was wondering if anyone else had any experience with this.