No one here can help you with diagnosis. That is something you really do have to see a professional for, and that's what everyone else will say.

If you don't have insurance but are having problems that are distressing to you, it's worth saving up to see a psychiatrist and get some certainty about it. In the meantime, you can look for online quizzes (like the ones here on PC) that can help you get more of a handle on how likely it is that you might have any of these conditions and should seek help.

What you describe does not sound like ADD to me; inattention could be an issue but you haven't mentioned any of the most typical symptoms. Low cognitive function often comes with depression, but there's a lot more misery to it than that. Not likely brain damage unless you've had head trauma or extensively abused substances. It could be something more like Central Auditory Processing Disorder, but that's just a guess from a non-doctor - you might want to look it up and see how well you relate to the description of the symptoms.

Adderall is not a methamphetamine. It's a blend of amphetamine salts, none of which are methamphetamine. Methamphetamine (Desoxyn) is very rarely prescribed because of the very high risk of addiction and abuse.

There is also at least one non-stimulant medication for ADD, Strattera, but it is only available as a brand-name drug ($$$). If you have no insurance, the prescriptions are not cheap - I'm on the generic version of Adderall XR 15mg/day; without health benefits it would cost me $140/month retail.