Don't get discouraged. I feel like stem fields are filled with people that were groomed their whole life for it. It's easy to get over whelmed and feel impostor syndrome. But it's just a skill, same as everything else. All it requires is concentrated time and practice.
I have ADD too and am...
I'm a liberal arts major, and I can see that going no where fast. I love math and science, though I only have very basic knowledge of each. I grew up poor, and went to one of the lowest ranked school districts in my state so I wasn't really exposed to any of it.
I always thought I hated school...