Getting organized regardless of diagnosis

I think I have dyscalculia. I never knew it was a real thing until now but I always failed at math every time and I am always late for stuff even if I don’t mean to be and my money management is not in control at all. It’s like anything that has to do with money or time or future stuff just gets all muddled in my head and I can’t even get my head around it. I am also not able to read a map or follow directions and I am always getting lost even when I think I know the way somewhere. I always knew there was something wrong with me but I just thought I was sort of stupid in some ways although I am very smart in other ways. I have never been able to keep a job since I am always screwing it up But it is nice to think of my having some real disorder. So what now? How can I know for real if I have this disease and what can I do to get better at all this stuff?